In MrsThompson's Elementary Classroom, She Gives Happy Face Stickers to Students

Multiple Choice

In Mrs.Thompson's elementary classroom, she gives happy face stickers to students for being attentive, turning in their homework on time, making good grades, and other productive classroom behaviors.At the end of the week, the students can exchange these stickers for a special treat or small toy.Mrs.Thompson's is using

A) a time-out system.
B) systematic desensitization.
C) a token economy.
D) a primary reinforcement schedule.