So-called "engineered foods," usually in powder or liquid form, consis

So-called "engineered foods," usually in powder or liquid form, consist of protein that is distilled from natural sources and supplemented with vitamins and minerals. Although the amino acids contained in such products stimulate the production of growth hormones, these hormones produce growth in connective tissue rather than in muscle mass; this does not improve muscle strength. Hence, athletes, who need to improve their muscular strength, should not consume engineered foods.

The argument depends on assumption which one of the following?

(A) An increase in muscle mass produces an increase in strength.
(B) People who are not athletes require neither stronger connective tissue nor muscle strength.
(C) If an engineered food does not improve muscle strength, there is no other substantial advantage to athletes from consuming it.
(D) Consuming engineered foods that provide nutrients that can be obtained more easily elsewhere is unhealthy.
(E) Growth of muscle mass enhances muscle strength only when accompanied by growth of connective tissue.