Polls have shown that a higher percentage of graduating university students are against proposals to reduce government social services than are students entering their first year at a university. These polls lead us to the conclusion that people with a university education are more likely to favor retaining or increasing the present level of government social services than are members of the overall population.
Which one of the following, if true, most seriously weakens the argument?The argument assumes that
because graduating students are more supportive of social services than entering students, people with a university education in general must be more supportive than the overall population. The main weakness is that the argument jumps from current students to all university-educated people.
(A) The polls of graduating university students were designed to avoid overrepresenting any single academic discipline.
This does not weaken the argument. It actually makes the poll of graduating students seem more reliable.
(B) The political views of people with a university education are to a large degree influenced by their professors, and university professors are usually against reducing government social services.
This may help explain why graduating students differ from entering students, but it does not show that the final conclusion about university-educated people versus the overall population is false.
(C) Polls of retired persons who have not graduated from a university show a higher percentage of persons in favor of reducing government social services than do polls of retired persons who have graduated from a university.
This supports the conclusion rather than weakening it. It suggests university graduates are indeed less likely to favor reducing social services.
(D) Polls of those who graduated from a university more than five years before being polled show a higher percentage of people in favor of reducing government social services than do polls of the overall population.
This is the best answer. The conclusion is about people with a university education in general. If people who graduated more than five years ago are actually more likely than the overall population to favor reducing social services, then the conclusion is seriously undermined.
(E) In the polls cited, graduating university students were more likely to express strong opinions about the question of reducing government social services than were students entering a university.
This does not weaken the argument much. The issue is not strength of opinion, but which side they are on.
Answer: (D)