The correct answer to this question is D, Behavioral focus. This focus is one of the many branches of psychology. It studies the behavioral patterns of people, along with their emotions, thoughts, and actions. The behavioral center has four sub-divisions, which are cognitive-behavior therapy, applied behavior analysis, behavior therapy, and cognitive therapy.
The behavioral focus was first established by John B. Watson's 1913 paper, titled "Psychology as the Behaviorist Views It." His article, infamous quotes, and his ideas have given him the name, father of behaviorism. This question deals with psychology and would appear on a test for someone studying that subject.
D is the answer to this question. There are some people who learn how to react to different circumstances depending on what they are accustomed to do. For example, there are some people who may become afraid of the sounds that are heard when the mall is closing down because there are a lot of items that can make a lot of noise.
They may have associated the noise with something that they have already experienced in the past. There are also a lot of people who may find their mouths salivating when they smell something that they find pleasant. These are responses that people may be accustomed to doing.