In Classical Conditioning, a Generalization Occurs When

In classical conditioning, a generalization occurs when

A) a previously reinforced response is no longer reinforced but continues to be observed.
B) a previously reinforced response is no longer reinforced, and the response decreases.
C) a decrease occurs in the frequency of an undesired response.
D) it involves the tendency of a new stimulus similar to the original stimulus to elicit a similar response.