Try as you might, you are unable to teach your dog to do a somersault. He will roll around on the ground, but he refuses to execute the gymnastic move you desire because of

A. equipotentiality.
B. preparedness.
C. instinctive drift.
D. chaining.

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Just before something scary happens in a horror film, they often play scary-sounding music.
When I hear the music, I tense up in anticipation of the scary event. In this situation, the music serves as a
A. US.
B. CS.
C. UR.
D. CR.

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