Sentence Correction

A new study published by the Journal of the American Medical Association has found that women who exercise regularly and maintained a healthy diet are at low risk of sudden cardiac death during physical exertion that is moderate to vigorous in nature.


(A) maintained a healthy diet are at low risk of sudden cardiac death during physical exertion that is moderate to vigorous in nature

(B) maintain a healthy diet are at low risk of sudden cardiac death during moderate to vigorous physical exertion

(C) maintain a healthy diet will be at low risk of sudden cardiac death during moderate to vigorous physical exertion

(D) maintained a healthy diet were at low risk of sudden cardiac death during moderate to vigorous physical exertion

(E) maintain a healthy diet are at low risk of sudden cardiac death during physical exertion that is moderate to vigorous in nature

OA is B

What is wrong with E ?

Hi,

Can anyone please help me in analyzing the choices of this SC question ? Please <i class="em em-anguished"></i>