What type of fiber is most beneficial for lowering blood cholesterol levels and subsequent cvd risk?

The answer to this question would be: soluble fiber

Fiber is food that contains carbohydrate that cant is digested, thus cant is absorbed, by human intestine. Fiber can help digesting food as it helps the food moves in the intestine and gives bulk to the feces. Fiber can be divided into the soluble and insoluble fiber.
Soluble fiber can decreases serum total cholesterol and decreases the low-density lipoprotein cholesterol. It also can and reduce insulin resistance for a diabetic patient.

Ithink it’s c or b for the answer.