822. The root systems of most flowering perennials either become too crowded, which results in loss in vigor, and spread too far outward, producing a bare center.
(A) which results in loss in vigor, and spread
(B) resulting in loss in vigor, or spreading
(C) with the result of loss of vigor, orspreading
(D) resulting in loss of vigor, or spread
(E) with a resulting loss of vigor, and spread
The sentence is using the idiom either X or Y. The only case which satisfies parallelism between X and
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(A) which results in loss in vigor, and spread
(B) resulting in loss in vigor, or spreading
(C) with the result of loss of vigor, orspreading
(D) resulting in loss of vigor, or spread
(E) with a resulting loss of vigor, and spread
The sentence is using the idiom either X or Y. The only case which satisfies parallelism between X and
...