please check my answer thanks

Question

Which of the following is an example of an explanatory fiction?

A. worry and sadness are the cause of most serious behavior problems
B. Dogs fear some places and things because they are not famillar with them
C. Dogs are trained to obey commands as quicly as possible
D. Puppies experience a sensitive period that starts at about three weeks of age

I picked C

Answer 1

It seems to me that B is the only answer which proposes a explaination for a condition.