Cholera Toxin Can Make You Sick Through Overactivation of a Gαs

Cholera toxin can make you sick through overactivation of a Gαs pathway even if your body stops making the ligand associated with activation of the pathway.Knowing this,which of the following CANNOT be true about cholera toxin?

A) It chemically modifies the Gαs protein.
B) Cholera toxin activates a ligand-activated G protein-coupled receptor.
C) It prevents hydrolysis of bound GTP to GDP.
D) It leads to continuous activation of adenylyl cyclase.