I would say A. Because c and d r very dangerous if u think about it. And b is right in some situations. But if u do a then people can see whts going on if something happened because of the light. and it is safe. If wrong let me know. :D
most likely a temp above 43 degrees celsius, i think this is correct but not entirely sure
I don’t think that’s a question you have to fill in correctly
I think because so they can stay healthy for while
