Chipper,the Family Cocker Spaniel,wags His Tail When He Hears Father's

Multiple Choice

Chipper,the family cocker spaniel,wags his tail when he hears Father's car come up the driveway.Psychologists believe that Chipper does this because:

A) Father must arrive home at the same time every day and Chipper's internal clock triggers his response
B) dogs will be aroused by any sounds originating from outside the house
C) he has a cognitive representation of his master and this thought causes him to wag his tail
D) the sound of the car predicts the entrance of his beloved master