Molly, a College Student, Has Never Smoked, Jogs About 3

Molly, a college student, has never smoked, jogs about 3 miles per day, and emphasizes fruits and vegetables in her diet. What is the fourth health habit that would help her reduce her overall risk of chronic disease by 78%?

A) avoiding alcohol use
B) engaging in stress reduction techniques such as meditation
C) maintaining a nonobese weight
D) sleeping between 7.0 and 8.5 hours per night