Amanda Engages in Several Health-Risk Behaviors,including Smoking,lack of Physical Activity,and

Amanda engages in several health-risk behaviors,including smoking,lack of physical activity,and poor diet.If she chooses to change only one of these behaviors,which change will have the biggest impact on reducing her risk of developing a chronic disease?

A) Inactivity
B) Smoking
C) Poor diet
D) Each will have the same impact.