Salivation Can Become a Conditioned Reflex

Salivation can become a conditioned reflex .This suggests that:

A) Pleasant taste sensation are not related to the reflex .
B) Only salivatory nuclei in the brainstem need to be excited by taste sensation without participation of suprasegmental influences.
C) The cerebral cortex partially controls salivation.
D) salivation could be completely interrupted in a decorticate animal whose tongue is mechanically stimulated.