A for me.
Tricky one. There is an idiom being tested here I believe. You have "rather than" or you have "more X than Y".
A. "conforming to the shape of the body rather than flauting shape..." sounds clear/clean. And correct usage of "rather than" in my opinion.
B. Altered intent. "conformed" is odd and "not to flaunting shape" is also weird
C. "and not to shape flaunted" is awkward
D. "More TO... than shape flaunted" sounds awkward.
E. "more TO the shape of the body than flaunting shape..." sounds awkward.
To me, both D and E would sound better if it was "more TO....than TO..." this seems consistent and concise.
31. Gone are the sharp edges and jutting planes of styles from former eras
instead, designers of everything from cars to computer monitors have adopted a cornerless style of smooth surfaces and curves that is more ergonomic, conforming to the shape of the body rather than flaunting shape for its own sake.
(A) more ergonomic, conforming to the shape of the body rather than flaunting shape
(B) more ergonomic, conformed to the body's shape and not to flaunting shape
(C) ergonomic, more conformed to the shape of the body and not to shape flaunted
(D) ergonomic, conforming more to the body's shape rather than shape flaunted
(E) ergonomic, conforming more to the shape of the body than flaunting shape