Which Preventative Measure(s)may Protect Against Development of Cardiovascular Disease

Which preventative measure(s) may protect against development of cardiovascular disease?

A) Exercising regularly for at least 30 minutes a day
B) Maintaining high-density lipoprotein (HDL) greater than 50 mg/dL
C) Refraining from smoking
D) Obtaining and maintaining a healthy weight
E) Maintaining triglycerides above 150 mg/dL