Note: Both Questions Refer to the Same Situation

Multiple Choice

Note: Both questions refer to the same situation.
-Ms. Washington tries to ignore Warren when he tells jokes in class. But sometimes Warren tells a joke so funny that Ms. Washington laughs in spite of herself. Rather than decreasing his joke-telling, Warren begins telling even more outrageous jokes. Inadvertently, Ms. Washington is modifying Warren's joke-telling behavior through:

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