Which of the following is a risk factor for coronary artery disease?

A high saturated fat diet is considered a risk factor for coronary artery disease due to its impact on cholesterol levels in the body. Consuming excessive amounts of saturated fat can lead to an increase in low-density lipoprotein (LDL) cholesterol, commonly referred to as "bad" cholesterol. Elevated levels of LDL cholesterol can contribute to the development of atherosclerosis, where plaque builds up in the arteries, narrowing them and leading to reduced blood flow. This condition can ultimately result in coronary artery disease, which can lead to serious cardiovascular events such as heart attack or stroke.

In contrast, regular exercise is generally associated with heart health, as it helps to lower LDL cholesterol levels and increase high-density lipoprotein (HDL) cholesterol, or "good" cholesterol. Moderate alcohol consumption, while it can carry some health risks if abused, has been shown in some studies to have protective effects on heart disease when consumed within recommended limits. Low blood glucose levels might indicate conditions like hypoglycemia, but they are not directly linked to an increased risk of coronary artery disease in the same way that a high saturated fat diet is.