Final answer:
Fatigue influences both reaction time and vision time, as it impairs the ability to respond quickly and process visual information effectively.
Step-by-step explanation:
Fatigue can significantly influence a person's reaction time and vision. When an individual is fatigued, their ability to respond quickly to stimuli is often impaired which can lead to slower reaction times. Moreover, fatigue can also affect one's visual acuity and the speed of processing visual information, leading to impaired vision or 'vision time'. Therefore, the correct answer to the question 'What does fatigue influence?' is C. Both.
Effects of Fatigue on Reaction Time
Fatigue can decrease alertness and extend the time it takes for a person to respond to situations. For example, when a person is driving, being fatigued can mean it takes longer to react to a sudden stop in traffic, increasing the risk of accidents.
Effects of Fatigue on Vision
Similarly, fatigue can cause symptoms such as blurry vision, difficulty focusing, and delayed visual perception. This can impact tasks that require visual precision and quick assessments of visual information, like reading or recognizing faces from a distance.