In Terms of Operant Conditioning of Reflexive Behavior, the Experiment

In terms of operant conditioning of reflexive behavior, the experiment by Miller and Carmona (1967) showed:

A) That the increased flow of saliva was accompanied by the dogs being more alert
B) That salivation and heart rate were both susceptible to operant conditioning
C) Conclusive results for operant conditioning of salivation
D) All of these