1. In measuring the amount of ATP and NADPH consumed by the Calvin cycle, you find 30,000 molecules of ATP consumed but only 20,000 molecules of NADPH. WHere did the extra ATP molecules come from?

A) Chlorophyll
B) photosystem II
C) cyclic electron flow
D) noncyclic electron flow
E) photosystem I

I think the answer is C but I'm not sure