I think it would be A. Helicase
Compound microscope im pretty sure is the answer!
I’m not sure I understand, can you be more specific?
Answer:
This can only be due to the fact that the Universe is expanding. Further, by measuring the distance to the galaxies, one finds that the velocity of recession is proportional to the distance of the galaxy from us. This is called Hubble law after Edwin Hubble who was the first to discover it.