og 78---介词短语和分词短语的区别

78. 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, or spreading

(D)      resulting in loss of vigor, or spread

(E)       with a resulting loss of vigor, and spread

Choice A misuses which: as a relative pronoun, which should refer to a specific noun rather than to the action of an entire clause. A also produces the unidiomatic and illogical con­struction either... and. Choice B properly uses a verb phrase (resulting ...) instead of which to modify the action of the first clause and also correctly completes either with or, but the verbs following either and or are not parallel: spreading must be spread to match become. Choice C is flawed by the nonparallel verb spreading and the wordy phrase that begins with the result of. Choice E is similarly wordy and uses and where or is required. Choice D--concise, idiomatic, and parallel with the rest of the sentence--is best.

我的问题是，如果E后面的AND改成了OR是不是也可以？

而且这里  resulting in loss of vigor做同位语成分还是插入语？那么with a resulting loss of vigor，介词短语是不是也可以做同位语成分？

介词短语和分词短语的区别是什么呢？谢谢