Those who enter the Peace Corps with a notion of self-sacrifice will be content to live in a hut or even a tent, and there is no doubt that third-world populations are sometimes better served by
volunteers of this kind instead of by people who live in accommodations specially designed for them.(A) volunteers of this kind instead of by people who live in accommodations specially designed for them
(B) volunteers like these rather than people who live in accommodations specially designed for it
(C) these volunteers instead of by people who live in accommodations specially designed for them
(D) such volunteers than by people who live in accommodations specially designed for them
(E) such volunteers rather than by people who live in accommodations specially designed for it
Since it was indicating preference (better served by), I eliminated options which didn't include 'rather than' and got it wrong.