Answer:
C). Chaining.
Explanation:
Chaining is exemplified as the instructive approach that involves a series of reinforced individual behaviors in order to correspond/comprehend a particular complex behavior. Since the person is not able to learn the desired complex behavior immediately, the process is sub-divided into a sequence of responses to reinforce the desired behavior gradually.
In the given example, the division or breaking down of activities in parts or steps reflect the individual responses/behaviors that would eventually result in a learned complex behavior('learning how to brush teeth') comprising of all these parts/individual responses together. Therefore, option C is the correct answer.