A 1978 Study of Harvard Alumni Found Those Who Expended

Multiple Choice

A 1978 study of Harvard alumni found those who expended 2,000 kcal weekly (like 20 miles of jogging or equivalent weekly) had lower heart attack risk than those less physically active. What else did this study find?​

A) ​More exercise also benefited the men who were smokers.
B) ​More exercise also benefited the men with hypertension.
C) ​More exercise also benefited the men in both (a) and (b) .
D) ​More exercise than 2,000 kcal lowered heart risk further.