Final answer:
The main underlying risk factor for metabolic syndrome is insulin resistance. The correct option is C .
Step-by-step explanation:
The main underlying risk factor for metabolic syndrome is insulin resistance. Insulin resistance refers to a condition in which the body's cells do not respond properly to the hormone insulin, which is responsible for regulating blood sugar levels. When the body becomes resistant to insulin, it can lead to elevated blood sugar levels and other metabolic abnormalities associated with metabolic syndrome.
Insulin resistance is often accompanied by other risk factors such as obesity, sedentary lifestyle, and poor diet. These factors can further exacerbate the development of metabolic syndrome. For example, obesity can lead to increased insulin resistance and inflammation, both of which contribute to the development of metabolic syndrome.
It is important to note that while age, heart disease, and high cholesterol levels can increase the risk of metabolic syndrome, insulin resistance is considered the primary underlying risk factor.