Which Statement About Protein Kinase a (PKA) Is False

Which statement about protein kinase A (PKA) is false?

A) In the inactive state, PKA exists as a tetramer of two regulatory (R) and two catalytic (C) subunits.
B) PKA binds a total of four molecules of cAMP, one on each of the four subunits.
C) PKA binds a total of four molecules, two molecules on each of the two regulatory (R) subunits.
D) Once activated, the catalytic (C) subunits dissociate and activate target molecules.