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Stressful environments lead to some unhealthy behavior such as a poor eating habit, which      _____ increases the risk of heart disease.

A. in turn         B. in return       C. by chance           D. by turns

. Stressful environments lead to some unhealthy behavior such as a poor eating habit, which      _____ increases the risk of heart disease.

A. in turn         B. in return       C. by chance           D. by turns

Stressful environments lead to some unhealthy behavior such as a poor eating habit, which      _____ increases the risk of heart disease.

A. in turn     B. in return     C. by chance   D. by turns

Stressful environments lead to some unhealthy behavior such as a poor eating habit, which      _____ increases the risk of heart disease.

A．in turn         B．in return        C．by chance       D．by turns