Answer: A. Fixed-ratio
Explanation: This fixed ratio implies a reinforcement schedule where the total response is reinforced, i.e rewarded only after a certain number of responses, i.e the total response consists of several repeated responses. This is otherwise a term from operant conditioning, when, for example, a dog is rewarded with food only when a few, such as ten times, repeat an action. Food is reinforcement, after which a certain rate of reactions, i.e repetition of action by the dog, continues. This rate is fixed because after every ten repetitions, the dog will receive reinforcement, that is food.
In this case, which is a little different, it is a carpet installer, although the same fixed-rate reinforcement was applied. Had Blake hit the hourly job, he could have gotten a certain number of dollars every hour, dollars are a reinforcement. However, he would not have to do the same amount of work every hour, i.e repeated actions, and would earn the same amount of dollars.
This way how actually he hit a deal, only with the same number of repeated actions, i.e square foot, will receive the same amount of dollars. So after every fixed rate of work done, that is, certain number of square foot, Blake gets a reward.
