If the hypothesis stated in lines 36 - 40 is true, it can be inferred that nutritional the

ory should argue that the consumption of more polyunsaturated fats

A．necessitates the consumption of higher levels of carbohydrates

B．is unlikely to affect the ratio of LDL to HDL levels in the bloodstream

C．is likely to have no observable effect on the risk of coronary heart disease

D．is potentially capable of wholly eliminating cholesterol levels in the blood

E．is poorly understood in light of the failure of certain controlled feeding studies