Thierry and Renée Each Want to Train Their Dogs

Multiple Choice

Thierry and Renée each want to train their dogs.Thierry wants his dog to feel relaxed when the doorbell rings.Renée wants her dog to bark only when she gives the command to do so.Which methods would be best for each of them

A)  operant conditioning for Thierry and classical conditioning for Renée 
B)  operant conditioning for both 
C)  classical conditioning for both 
D)  classical conditioning for Thierry and operant conditioning for Renée