In contrast to the symphonies of Haydn, a much freer use of dissonance is evident in the symphonies of Mahler.
the comparison is b/w Symphonies of Haydn and Symphonies of Mahler . In ans .choice we can expect the comparision b/w Haydn and Mahler but the intended meaning should not change .
Also note that in GMAT noun's noun and can not be parallel to noun of noun as in- Ram's book can not be parallel to Book of ram
(A) In contrast to the symphonies of Haydn, a much freer use of dissonance is evident in the symphonies of Mahler. -
wrong construction the better idiom is In contrast to X,Y(B) In contrast with Haydn's symphonies, Mahler uses dissonance much more freely.-wrong comparison -
Haydn's symphonies is contrasted to Mahler (C) In contrast to those of Haydn, the symphonies of Mahler demonstrate a much more free use of dissonance.--
here the comparison is corrected but intended meaning is changed by introducing much more free use of dissonance - more then what???? -more should be followed by than what????(D) In contrast to Haydn's symphonies, Mahler's demonstrate a much freer use of dissonance.--
-correct comparison (E) In contrast with Haydn's symphonies, those of Mahler use dissonance much more freely.-
--noun's noun can not be parallel to noun of noun