Just after they taste a sweet liquid, mice are injected with a drug that produces an immune response. later, the taste of the sweet liquid by itself triggers an immune response. this best illustrates
a. operant conditioning.
b. cognitive learning.
c. classical conditioning.
d. observational learning.

Option C

Explanation:

Classical conditioning is also referred as Pavlovian conditioning and can be defined as a process which in which living beings learn with the help of association and was discovered by Pavlov, a Russian physiologist.

This conditioning links two stimuli with each other to produce a new response, i.e. learned response.

In the case of mice also, two stimuli are linked together thus the case is that of classical conditioning.

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