GMAT Sentence Correction (SC) | As rainfall began to decrease in the Southwest about the

As rainfall began to decrease in the Southwest
about the middle of the twelfth century, most of the
Monument Valley Anasazi abandoned their homes to
join other clanswhose access to water was less
limited.

(A) whose access to water was less limited
(B) where there was access to water that was
less limited
(C) where they had less limited water access
(D) with less limitations on water access
(E) having less limitations to water access

Why the answer is as the OG suggests?
why not D or E?
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