The phenomenon of sleep still mystifies researchers; it is a condition where the body may become violently animated or where it may be completely paralyzed.
(A) it is a condition where the body may become violently animated or where it may be completely paralyzed
(B) it is a condition where the body may become violently animated or it may become completely paralyzed
(C) it is a condition in which the body may become violently animated or complete paralysis may occur
(D) it is a condition in which the body may become violently animated or in which the body may become completely paralyzed
(E) it is a condition in which the body may become violently animated or become completely paralyzed
OA is E.
I was confused between D and E and chose D. Though both D and E both maintain the parallelism, but have a doubt from where to start looking for parallelism. Please explain.
Thanks