You and your 27-year-old brother decide to get in shape and start running. After the first run of 3 miles, your brother is winded and tired. He is surprised because he was a cross-country runner in high school. What would you tell him?
a. He is experiencing a normal decline in vital capacity.
b. He really needs to go to the doctor, there must be something wrong with him.
c. He is simply too old to run any longer.
d. After years of a sedentary lifestyle, he is probably at risk of a heart attack.
Answer: A
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Piaget convinced the field that children are
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