Clarence Is a Cat That Is Always Fed in the Same

Multiple Choice

Clarence is a cat that is always fed in the same place, at the same time, every day. His food is taken out of the same cupboard before each meal, which has a particular sound when it opens that is loud enough to be noticeable. Although that cupboard is rarely opened for anything other than his cat food, when it is, Clarence seems to expect that he's about to be fed. What could explain his behaviour?

A) sensitization
B) higher order conditioning
C) lower order conditioning
D) habituation
E) operant conditioning