Statins are drugs that become more effective when used with lifestyle modifications. Consistent exercise, like brisk walking or aerobic activities, benefits heart health and increases HDL ("good") cholesterol. A diet high in fiber traps cholesterol in the digestive system, reducing its absorption and thus lowering LDL levels. Option (a) A diet high in fat can negatively impact cholesterol levels.
Option (b) A lack of physical activity is linked to cardiovascular risk.
Option (d) Smoking harms blood vessels and elevates the risk of heart disease.
Therefore, the most suitable complementary choice is (c).