A)..."being" should be avoided in most cases. E) would create a run-on-sentence. that consists of two independent sentences that are put together without proper punctuation. the first part acts like an appositive phrase. so A) is fine. but i think more important and much faster is to notice that "being" is no-no in gmat.
If your mind can conceive it and your heart can believe it, have faith that you can achieve it.