Note: Both Questions Refer to the Same Situation

Multiple Choice

Note: Both questions refer to the same situation.
-Warren has earned himself a reputation for being the class clown. His teacher, Ms. Washington, used to laugh at Warren's funny remarks, but is now trying to discourage Warren's disruptive behavior by ignoring his jokes. In behaviorist terminology, Ms. Washington is now trying to modify Warren's joke-telling behavior through:

A) stimulus discrimination
B) extinction
C) shaping
D) negative reinforcement