In the Calvin Cycle Reaction, How Would You Describe the Regeneration

In the Calvin Cycle reaction, how would you describe the regeneration of RuBP?

A) 3 CO₂ molecules reaction with 3 RuBP molecules to form 6 3PG molecules
B) 6 ATP molecules are dephosphorylated and 6 NADPH molecules are oxidized, which results in 6 BPG molecules
C) 3 phosphates from 3 ATP molecules are added to 5 G3P molecules