Answer:
The correct answer is letter "B": fixed-interval.
Explanation:
American psychologist and social philosopher B.F. Skinner (1904-1990) is the father of Operant Conditioning Theory which proposes it is needless to analyze thoughts to explain individuals' behaviors. In such a way, Skinner believed human beings react based on a series of rewards and punishments influenced by reinforcements.
Skinner schemed five (5) schedules to relate the nature of those reinforcements: continuos, fixed-interval, variable interval, fixed ratio, variable ratio. In the fixed-interval rewards are given at fixed rates. This causes average and irregular performance with rapid extinction. Thus, a payment plan that does not vary based on performance is an example of the fixed-interval reinforcement schedule.