Conclusion : No wealthy person should be appointed to that committee.
Author's line of reasoning : Because a number of Grandville's wealthiest citizens have been criminals, the authors makes a conclusion that every wealth person has a criminal background. Hence, the author concludes that
no wealthy person should be appointed in the Planning Committee.
Pre-thinking : So the author generalizes that every wealth person can be a criminal having reproachable personal standards of ethics.
(A) confuses a result with something that is sufficient for bringing about that resultOut of scope.
(B) mistakes a temporal relationship for a causal relationshipThe premise states that the reason that wealthy persons should not be included as the author believes that personal standards of ethics are reproachable due to their criminal background. Hence he does not mistake a temporal relationship in the argument.
(C) assumes that because a certain action has a certain result the person taking that action intended that resultThe author's argument to not include wealthy persons has nothing to do with the intention of wealth individuals. The author wants to keep the Grandville Planning Committee free from any individuals who have high personal standards of ethics.
(D) judges only by subjective standards something that can be readily evaluated according to objective standardsAgain, this is not in the scope of the argument.
(E) generalizes on the basis of what could be exceptional casesThis is exactly what we were looking for ! The author generalizes that every wealth person is a criminals and have questionable personal standards of ethics. Hence, the author makes an assertion to not include
any wealthy person in the committee.
IMO - E