5. Read the research Passage below and answer each of the following questions (8marks). Several researchers want to study the effect of exercise on visual perception. Each decides to use a different...

Extracted text: 5. Read the research Passage below and answer each of the following questions (8marks). Several researchers want to study the effect of exercise on visual perception. Each decides to use a different method in their study. Researcher A assigns participants to one of two groups, exercising for 10 or 0 minutes, and then records their performance on a task designed to measure visual acuity. Researcher B decides to use the same task to measure visual acuity performance from professional athletes vs. college students who do not play a sport. Researcher C asks a sample of students from a university to report the number of hours per week they exercise, then looks at the relationship between this measure and their performance on the same visual acuity task. Name the kind of method used by each researcher: a) Researcher A b) Researcher B c) Researcher C d) Which researcher (A, B, or C) can make the strongest claim about whether exercise is causally responsible for a difference on the visual perception task?