Ronaldo's dog, mickey, used to be classically conditioned to bark every time he heard the doorbell because he knew people would be arriving and he wanted to say hello. while mickey's owner did a good job of extinguishing mickey's association of these stimuli, a doorbell can still sometimes evoke some responding again of mickey barking. it is likely that mikey is showing what aspect of conditioning?

The correct answer is spontaneous recovery.

Spontaneous recovery refers to phenomenon where an extinguished conditioned response or behavior re-emerges. In this example, Mickey is exhibiting spontaneous recovery when his extinguished behavior- barking when the doorbell rings- re-emerges. Research studies have found that occasional occurrences of spontaneous recovery are common after conditioned behaviors have been extinguished. 

The ceremonial column.