Multiple Choice
Moderate exercise is better than none, but excessive exercise is harmful.What is the shape of the graph of health benefits versus hours of exercise per week if health benefits are measured on the vertical axis and exercise is measured on the horizontal axis?
A) a positively sloped straight line
B) a negatively sloped straight line
C) a U-shaped curve
D) a hill-shaped curve
Correct Answer:

Verified
Correct Answer:
Verified
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