Answer:
The correct answer is C. classical conditioning.
Step-by-step explanation:
This type of conditioning, also known as Pavlovian conditioning, means that two stimuli are connected in order to produce a new type of response. In this case, the daughter receives a sticker every time she successfully uses the toilet, and once she collects ten of them, she gets a reward (she can pick up a toy). It is the same experiment Pavlov did with the salivating dog.