Garcia and Koelling's Findings on Taste Aversion in Rats Challenged

Multiple Choice

Garcia and Koelling's findings on taste aversion in rats challenged the previously accepted principle that

A) positive reinforcement is more effective than punishment in changing behavior.
B) the US must immediately follow the CS for conditioning to occur.
C) learning is influenced by the frequency of association between the CS and US.
D) learning occurs only if a response is followed by reinforcement.