Unbeknownst to the Rest of the World, Roger Was Wearing

Multiple Choice

Unbeknownst to the rest of the world, Roger was wearing green underwear when he aced his calculus test at the beginning of the semester. Ever since, Roger always wears green underwear on test days in his college classes. In operant conditioning terms, Roger's superstitious behavior is the result of:

A) accidental reinforcement.
B) a variable-interval schedule of reinforcement.
C) shaping.
D) behavior modification.