C.
This is because the question says "than" followed by a name (noun). You can say more friendly but it is not commonly used in the US.
Answer:
The audiences location
Explanation: If they are in a different location from the presenter then it is an online presentation.
<span>C. how the information you have obtained fits in with your own ideas.</span>
Answer:
I think it's suggesting that supernovas are a threat to humans.
Explanation:
As it's talking about them exploding.
