The purpose of the operating systems is to provide an interface between the user and hardware. It's mange all resources, for example; memory, processors, and disk space. It's also mange how to file and store data in a computer system.
        
             
        
        
        
Answer:
The answer is B. Digital subscriber line technology
Explanation:
Digital subscriber line or DSL technology is used to transmit digital data over telephone wires.
It makes file sharing possible which includes multimedia data (i.e. transfer of pictures and graphics), and also video and audio conferencing. 
DSL uses a reliable medium that prevents packet loss and interruptions. It is also fast.
 
        
             
        
        
        
1. Less picture less distraction, but where to put pictures ? At the start of your presentation just to initially get the attention of the audience.
2. Use bullets for texts, never use paragraphs. Use short text or even words only which captures the subject of the presentation.
3. In conjunction with point 1. Use less animations as well. Especially for formal presentations
Additionally : Make sure to know your audience, for professionals, make the presentations short and precise. For much informal audiences you can be playful but always keep in mind not to overshadow the attention from the speaker.
        
             
        
        
        
A computer’s motherboard has a series of slots and connectors. Slots allow daughter boards to be plugged directly while connectors allow communication through cables with other peripheral devices. CPU sockets, Hard Drive connectors, Memory sockets, and Power connector are examples of components that can be connected internally in some way to the motherboard. Other physical devices include RAM, hard disks, and graphics card.