The requires some low probability behavior (e. g., completion of a task) to occur prior to the client being allowed to request access to the high probability behavior, that is, the desired sensory reinforcer.

C.Premack contingency

Explanation:

The Premack contingency refers to the behavior of persons depend on the high probability and low probability.

If behavior B is of higher probability is more than behavior A, then behavior A made more expecting by making behavior B i.e contingent upon it.

Let us take an example

If parents want that their children do their dinner but there is a condition that after doing it they get the dessert. So in this case, the dinner is low probability and the dessert is a high probability.

Therefore according to the situation, the correct option is C.

answer'; i believe the correct answer is (15,000) workers a year are treated for injuries caused by jacks, lifts or jack stands;

d,