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

Question

Quizplus · Accepted Answer

Research has found that optimism is related to better immune system function. The other options do not have a clear relationship with immune system strength.

Research Has Found That the Strength of Students' Immune Systems