Option A is incorrect, the type of fat that clears out blood vessels is the insaturated, on the contrary, an excess of saturated fat can block blood vessels.
Option C is incorrect because the quickest source of energy in food are the carbohydrates.
Option D is incorrect because fat stores more energy than other biomolecules.
So one reason why eating some fat is necessary is that stored fat cussions the internal organs (option B).
