Organisms That Obtain Carbon from a Source That Is Depleted

Multiple Choice

Organisms that obtain carbon from a source that is depleted or enriched in 14C relative to the atmosphere may return ages that are considerably older or younger than they actually are. This is due to:

A) De Vries effect.
B) the reservoir effect.
C) the effect of different photosynthetic pathways.
D) problems with calibrating the radiocarbon curve.