The answer is letter B.
Frustrations can be let off through physical activity. People who perform a physical activity are able to divert their attention from a negative into a positive perspective. This is because exercise is known to have beneficial effects not only to the body but also to the brain. Often times, frustrations are a result of anxieties that have no known cause unless identified by an individual. Sometimes a good long walk or a quick run will pinpoint the sources of these stressors because the mind's attention is diverted into physical exertion.