A patient with hypercholesterolemia is prescribed atorvastatin. What is the primary mechanism of action of this drug class?

✓ Correct Answer: Option B

Statins, such as atorvastatin, primarily act by inhibiting HMG-CoA reductase. This enzyme is the rate-limiting step in cholesterol biosynthesis in the liver, leading to decreased intracellular cholesterol and increased LDL receptor expression.