Critical Resoning

Mel: The official salary for judges has always been too low to attract the best
Candidates to the job. The legislatures move to raise the salary has done nothing to improve the situation, because
it was coupled with a ban on receiving money for lectures and teaching engagements.
Pat: No, the raise in salary really does improve the situation. Since very few judges teach or give lectures, the ban
will have little or no negative effect

Pats response to Mel is inadequate in that it
A. attempts to assess how a certain change will affect potential members
of a group by providing evidence about its effect on the current members.
B. mistakenly takes the cause of a certain change to be an effect of that change
C. attempts to argue that a certain change will have a positive effect merely
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by pointing to the absence of negative effects
D. simply denies Mels claim without putting forward any evidence in support
of that denial
E. assumes that changes that benefit the most able members of a group
necessarily benefit all members of that group.

why not E as answer?