The Binding of a Ligand to a G Protein--Coupled Receptor

The binding of a ligand to a G protein--coupled receptor will result in activation of adenylyl cyclase, which in turn will initiate which of the following pathways?

A) Ca²⁺-calmodulin
B) cAMP
C) cGMP
D) MAP kinase
E) Phospholipase C-Ca²⁺