Skip Would Like His Partner to Stop Leaving Shaving Cream

Multiple Choice

Skip would like his partner to stop leaving shaving cream and stubble in the sink after he shaves in the morning.At first, Skip complains to his partner about the mess. Then Skip changes tactics: he thanks his partner on the occasional mornings when he rinses out the sink. Skip has changed from using _____ to using _____.

A) positive punishment; positive reinforcement
B) negative reinforcement; negative punishment
C) negative reinforcement; positive reinforcement
D) positive reinforcement; negative reinforcement