Countries that legalized the drug X twenty years ago, because a significant percentage of the population had been using X on a daily basis without any apparent harm to the community at large, reset the benchmark for what is appropriate and proper behavior among their citizens. Since X's legalization, there has been an increase in manic depression, suicide and certain kinds of cancer. In order for Andovia, a country that has not yet legalized X, to avoid the development of such undesirable tendencies and prevent the social problems stemming from broad usage of drug X, it should close its borders and not issue visas to any tourists from countries where drug X is legal.
Which of the following, if true, most seriously weakens the argument above?The argument says Andovia can prevent the social problems linked to drug X by closing its borders and refusing visas to tourists from countries where drug X is legal.
The key assumption is that keeping out those tourists would meaningfully prevent broad use of drug X in Andovia. The best weakener shows that people in Andovia could still get drug X
without those tourists.
A. Drug X emits a faint smell that makes it very difficult for trained canines to identify at border control points.
This weakens somewhat, but not the most. It suggests detection at borders may be difficult, but the proposal is mainly to stop tourists from legal-X countries from entering.
B. The detrimental side effects of drug X only become visible after several years of usage.
Wrong. This may strengthen the concern about drug X, because harm may not appear immediately.
C. Andovia is surrounded on three sides by water, but has an excellent naval border police force.
Wrong. This supports the idea that Andovia may be able to control its borders effectively.
D. Drug X resembles several other designer drugs currently on the market.
This may create some enforcement difficulty, but it does not directly show that closing the borders to tourists from legal-X countries would fail.
E. Drug X is very easy to extract chemically from certain consumer products and is taken in droplet size doses that can easily be camouflaged as items such as hairspray or nail polish remover.
Correct. This seriously weakens the argument. If drug X can be obtained from ordinary consumer products and easily concealed, then refusing visas to tourists from countries where X is legal would not reliably prevent broad use of X in Andovia.
Answer: (E)