If ATP, labeled with radioactive phosphorus, is utilized by a plant during the Calvin cycle, which molecule(s) of the Calvin cycle will be radioactively labeled first?
A) Ribulose-1,5-bisphosphate (RuBP)
B) 3-Phosphoglycerate (3-PGA)
C) Glyceraldehyde-3-phosphate (G3P)
D) Ribose-5-phosphate