Which one of the following is a benefit of performing sit and reach?

flexibility

injury prevention

promote circulation

all of the above

The correct answer is D. All of the above. The sit and reach is a type of flexibility stretch that stretches your hamstrings. So obviously it would increase your flexibility and promote circulation. Stretching also helps with preventing injuries (I should know, I am an athlete myself). 
Hope I helped!

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This answer would be true