Which Claim About the History of the Earth Has the Most

Multiple Choice

Which claim about the history of the Earth has the most scientific support?

A) Photosynthetic producers must have come first to provide food for other organisms.
B) Anaerobic bacteria must have come first because there was no carbon dioxide in the atmosphere.
C) Photosynthetic producers must have come first to provide oxygen for other organisms.
D) Anaerobic organisms must have come first because there was no oxygen in the atmosphere.