Answer:
What is the question here? lol
Explanation:
 
        
             
        
        
        
Client/Server and Peer-to-Peer networks are the two major network architecture models in use today. They each have advantages and disadvantages that can be used to benefit a particular outcome.
Briefly, the client/server model relates to one or many client performing relatively simple requests, which are then executed by a server. The server is performing more complex tasks, and often interacting with many clients simultaneously. Examples of client/server models include most websites, including the Brainly page you are running right this instant. Your web browser is acting as a client, and the Brainly.com website is running as a web server. It receives simple requests or information from your browser, such as clicking on a question or text typed by your keyboard, and then acts on this information by consulting a database, returning values, or returning a whole new web page to your browser. The client/server model is very powerful in business as it allows powerful and secure server-side processing and relatively simple clients. Office 365 that runs all microsoft office suites such as word and excel in a web browser on 'the cloud' is an example of a highly sophisticated client/server architecture.
By contrast, peer-to-peer networks are a distributed architecture of equals. Instead of a simple client and complex server, all clients are equals and link together to form nodes on a distributed network. There is no central control (server) and each node acts as a client and server to other nodes. This is also an extremely powerful network; as there is no central control it is difficult to shut down a peer-to-peer network. Taking out one node will not break the network in comparison to the client/server architecture where if the server goes down, services halt. Prime examples of famous peer-to-peer networks are the Bitcoin network and similar cryptographic currency networks, and music and file sharing networks such as Torrents. The torrent tracker websites are client/server however once a torrent is loaded into a torrent downloading application, the file is collectively downloaded from hundreds of 'peers' across the world as part of the torrent peer-to-peer network.
        
             
        
        
        
Keyborad,mouse,light pen, touch pad, microphone, etc
        
                    
             
        
        
        
In computers we use: decimal constantly, hexadecimal daily, octal weekly and binary monthly.  Decimal is base 10, hexadecimal is base 16, octal is base 8 and binary is base 2.
To convert binary to decimal, simply add the magnitudes of the digits that are set. 
        
             
        
        
        
Answer:
I'd choose A, all of the above.
Reasoning Why: 
I'll be taking you on a step to step process on why I inputted the answer. 
The <div>, is basically like a container that you can group tougher, why this is great is because you can edit the div using a background-color effecting that group such as the following..
EXAMPLE OF BACKGROUND-COLOR DIV (background-color)
<!DOCTYPE html>
<html>
<head>
<title>Brainly Example | HTML Div</title>
<style>
#byexample{
background-color:red; 
/*Example of the Background-color attrib*/
/*You can also use the background-image attrib, however I recommend you checkout W3Schools, on that topic.*/
}
</style>
</head>
<body>
<div id="byexample">
<p>Just some random text to demonstrate.</p>
</div>
</body>
</html>
END OF EXAMPLE
You can also, in the <div> change multiple styles of an element in the div. However, if do want to change the styles of a single element you would need to nest it.
<!DOCTYPE html>
<html>
<head>
<title>Brainly Example | HTML Div</title>
<style>
#byexample #text{
background-color:red; 
color:yellow;
}
</style>
</head>
<body>
<div id="byexample">
<p id="text">Just some random text to demonstrate.</p>
</div>
</body>
END OF EXAMPLE
Lastly, you can group elements using divs, as stated in openclassroom (website). 
Anyways, I hope this helped! 
Happy coding!