assumption question

[sunil.kapil1277]

Critic: Works of literature often present protagonists who scorn
allegiance to their society and who advocate
detachment rather than civicmindedness. However,
modem literature is distinguished from the literature of
earlier eras in part because it more frequently treats
such protagonists sympathetically. Sympathetic
treatment of such characters suggests to readers that
one should be unconcerned about contributing to
societal good. Thus, modem literature can damage
individuals who appropriate this attitude, as well as
damage society at large.

Which one of the following is an assumption on which
the critic's argument relies?

(A) Some individuals in earlier eras were more
concerned about contributing to societal good
than is any modem individual.
(B) It is to the advantage of some individuals that they
be concerned with contributing to societal good.
(C) Some individuals must believe that their society is
better than most before they can become
concerned with benefiting it.
(D) The aesthetic merit of some literary works cannot
be judged in complete independence of their moral
effects.
(E) Modem literature is generally not as conducive
to societal good as was the literature of earlier
eras.

looking for a solution

[vjshankarb]

IMO D is the answer. I may be wrong. Please provide OA.