Answer:
Option A , a neutral stimulus will cause a similar response
Step-by-step explanation:
As per the Classical conditioning definition, when a neutral stimulus is associated with a behaviour producing natural stimulus, learning occur.
For example - When the ring of a bell is associated with the food smell, a dog starts salvation. Now even when the food is not associated with ringing of bell, a dog salivates on listening the ring of the bell.
Hence, option A is correct