Susan, Debra, and Sally are serving as subjects in a psychology experiment. Each will be taught to ride a bicycle. Susan will be taught by an expert instructor, Debra will be taught by a video demonstration, and Sally will be given a book on bicycles. The amount of time it takes each student to learn to ride will be recorded. This is likely a study of

The answer is c. acquisition.

Explanation:

Acquisition refers to learning a skill in such a way that it becomes automatic. For example, we have acquired our first language because we no longer think deeply about it when we use it.

Acquisition may take place in many ways, but it's commonly achieved through habituation, meaning it becomes familiar with repetition.