Use the following figure and the compounds labelled A,B,C,D,and E to answer the following questions.

-If ATP used by this plant is labelled with radioactive phosphorus,which molecule or molecules of the Calvin cycle will be radioactively labelled first?
A)B only
B)B and C only
C)B, C, and D only
D)B and E only
E)B, C, D, and E