Answer:
B. distributed computing model where clients are linked to one another through a network that is controlled by a network server computer.
Explanation:
Client - server computing model is a distributed network where it functions between two types of independent and autonomous processors: servers and clients.
In <em>Client/Serer computing</em> model, different nodes of clients make requests from a centralized host computer (server), and the server responds these requests and shares its resources.
In other words, servers are the devices which have the ability of serving requests made by clients.
Explanation:
<u> </u>
<u>Input & Output DevicesMouse and Keyboard. The two most common forms of input related to computers are the mouse and keyboard. ...Monitor. As humans are visually-focused, the most common output device is the monitor. ...Printers and Scanners. ...Microphone and Speakers.</u>

Answer:
The answer is likely C. "Can be used by CSS to apply the same formatting to more than one HTML element."
Explanation:
Given that the name of the attribute is "class," it sounds like the kind of code that would be applied to multiple elements intended to display something a specific way.
Qualification:
I've invested hours of my time into learning HTML, but I've never dealt with the "class" attribute. So, maybe take my answer as a grain of salt.
<span>There are several reasons why two devices are not synchronized: maybe there are not the same versions of the programs on both devices, maybe the software needs restart in order to have the latest input data, maybe the internet connection was lost during synchronization
Next steps would be:
- restart the devices
- Update to the latest version
- connect to the internet
- make the synchronization again
</span>