"In Classical Conditioning, as in Telling a Good Joke, Timing

Multiple Choice

"In classical conditioning, as in telling a good joke, timing is critical." By this, the authors of the textbook mean that the ________ must be presented ________.

A) CR and UCR; closely enough in time to be perceived as related
B) CR and UCR; far enough apart in time to be perceived as unrelated
C) CS and UCS; far enough apart in time to be perceived as unrelated
D) CS and UCS; closely enough in time to be perceived as related