The Sequence of Enzymes Active in Liver to Degrade Glycogen

The sequence of enzymes active in liver to degrade glycogen in response to glucagon is: . ~P indicates phosphorylation)

A) phosphorylase kinase, glycogen phosphorylase b, protein kinase A, glucagon
B) glucagon, phosphorylase kinase, glycogen phosphorylase b, protein kinase A
C) glucagon, Protein kinase A, phosphorylase kinase~P, glycogen phosphorylase a~P
D) glucagon, protein kinase A, glycogen phosphorylase a~P, phosphorylase kinase~P