Question: 4 5 Points Question 4 Research has found that the strength of students' immune systems was related to Option A their level of optimism. Option
4 5 Points Question 4 Research has found that the strength of students' immune systems was related to Option A their level of optimism. Option B the number of classes they felt they were going to pass. Option C the number of negative emotions they displayed. Option D the number of exams they had per month
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