Answer:
When you want to extend an electrical wire for an apparatus, e.g., a lamp or a speaker.
D. Press the accelerator to the floor once and release it.
Answer:
The only element visible is the presentation itself.
Explanation:
All of the other options, such as presenter's assistance, is hidden away from the projector, presentation device, etc. You are the only one that can see the window that shows what slide is next, presenter's notes, etc. <u>In other words, whatever you want the audience to see, that is only what they will see and nothing else.</u>
