Well, since C is the only example where a positive thing happens, then it is certainly not a potential problem, so 'they can provide a lot of energy for people to use' is the correct answer. The other examples are problematic.
Answer:
D
Explanation:
Because there were multiple theories on what they are.
B - agenda
An agenda is what the author really wants to point out (their underlying message) and it's typically written in a way where it's somewhat hidden. Example: political ads - they have an agenda for what they want to talk about and why it's important.
The answer here my good sir is going to be glade I hope this helps you stay safe of the corona virus
