Question

the leading killer of americans is: multiple choice smoking heart disease stress physical inactivity

Explanation:

Heart disease is a major cause - of - death in the United States. It encompasses various conditions like coronary artery disease, heart failure etc. and has a high prevalence and mortality rate among Americans. Smoking, stress, and physical inactivity are risk factors for heart disease and other health problems but are not the leading killer themselves.

Answer:

B. Heart disease