Which Statement About Edward Tolman's Conditioning Experiments Is Accurate

Multiple Choice

Which statement about Edward Tolman's conditioning experiments is accurate?

A) conditioned reinforcers were used instead of primary reinforcers.
B) one-to-one associations between stimuli and responses could not explain animals' behaviour.
C) animals' biological preparation to learn certain associations was experimentally manipulated.
D) the operant chamber could be used to test animal cognitions.