Peggy Wanted to Teach Her Dog How to Roll Over

Multiple Choice

Peggy wanted to teach her dog how to roll over.She tried giving him instructions,but it didn't work.She tried waiting for him to roll over so she could reinforce the behavior,but she had to go to bed before the dog rolled.Finally,she began reinforcing the dog when it made behaviors that more closely resembled rolling over.At last,using _______,she was able to teach the dog to do the trick.

A) shaping
B) positive reinforcement
C) positive reinforcers
D) secondary reinforcers