The hormone testosterone protects brain cells from injury and reduces

The hormone testosterone protects brain cells from injury and reduces levels of the protein beta-amyloid in the brain. Beta-amyloid causally contributes to Alzheimer's disease, and people whose brain cells are susceptible to injury are probably more susceptible to Alzheimer's disease. So there is reason to think that ______________________.

Which of the following most logically completes the argument?

(A) anyone whose brain cells are susceptible to injury will eventually develop Alzheimer's disease - will eventually. too extreme

(B) whether a person develops Alzheimer's disease is dependent entirely on the level of beta-amyloid in his or her brain - not entirely. Just more susceptible if the testosterone is low which will lead to low protein beta-amyloid

(C) Alzheimer's disease leads to a reduction in testosterone level - Opposite of cause and effect

(D) only people with Alzheimer's disease are at risk for injury to brain cells - Only. Too extreme

(E) a decline in testosterone levels puts one at increased risk for Alzheimer's disease - Correct. Follows the Cause-effect relation with with not so extreme language