Answer:
b. Jakob is operantly conditioned
Step-by-step explanation:
Operant conditioning is a type of learning where the behavior of an organism is changed by the act of punishment or reiforcement. This type of learning is voluntairily done by the organism.
Here, Jakob's behavior of running is reinforced because of the sense of elation he gets after a lengthy run. He does this on his own accord thus making it a case of operant conditioning.