Answer:
c) Classical conditioning.
Step-by-step explanation:
Classical conditioning refers to the process of learning by associating two stimuli that occur together. The response that occurs naturally by the present of the first stimulus (called unconditioned response) starts appearing in presence of the other stimulus (becoming a conditioned response).
Operant conditioning on the other hand, refers toa process of learning by rewards and punishments for certain behaviors.
In this case, Ms. Cardot wants her students to enjoy math, and she specifically wants them to associate math with pleasant thoughts. Therefore, she starts introducing candies (which generate pleasant thoughts by themselves) at the math center. This way, she believes that by classical conditioning, her students will start associating math with pleasant thoughts by itself.