Answer: People who are unable to identify significant stressors in their life.
I believe a. is the answer
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C. Most psychologists believe that prosocial behavior always contains an element of self sacrifice.
<span>True, because many people are competitive by nature, so they need the challenge of a good competition in order to feel motivated to do the physical activity. If there is no competition, they don't feel compelled to engage in any physical activity. That's why those people tend to choose team sports or other activities in which they have to compete against other participants.</span>
