The Text Authors Speculate That One Reason Your Pet Might

The text authors speculate that one reason your pet might prefer not to go to the vet is

A) because it is distressing to hear other animals crying out in pain and fear.
B) not clear because animals do not experience emotional empathy.
C) not clear because animals cannot mimic the facial expressions of others.
D) because it is uncomfortable to be constrained when around other animals.
E) because if there are non-human primates there they feel outnumbered.