Health research that provides guidelines for a healthy lifestyle comes from​

A) ​the Alameda County Study.
B) ​news reports on television.
C) ​the HART trials.
D) ​the Cunningham study.

The Alameda County Study is a well-known longitudinal study that has provided important guidelines for a healthy lifestyle, including the importance of regular physical activity, maintaining a healthy weight, avoiding smoking and excessive alcohol consumption, and maintaining strong social connections. The other options listed (news reports on television, the HART trials, and the Cunningham study) may provide some health information but they do not have the same breadth of research or influence on health guidelines as the Alameda County Study.