Question

I really need help with this on my homework. Can anyone help?

I think it's D. I'm not the best in Bio.

What do anaerobic organisms have in common with photosynthetic organisms?

A) They both appeared on Earth at about the same time.
B)They both can only exist as single-celled organisms.
C)They both need an energy source in order to survive.
D)They both produce carbon dioxide as a waste product.