Q38:
Unless tiger hunting decreases, tigers will soon be extinct in the wild. The countries in which the tigers’ habitats are located are currently debating joint legislation that would ban tiger hunting. Thus, if these countries can successfully enforce this legislation, the survival of tigers in the wild will be ensured.
The reasoning in the argument is most vulnerable to criticism on the grounds that the argument
A. assumes without sufficient warrant that a ban on tiger hunting could be successfully enforced(无关结果)
B. considers the effects of hunting on tigers without also considering the effects of hunting on other endangered animal species(无关它因)
C. fails to take into account how often tiger hunters are unsuccessful in their attempts to kill tigers(无关它因)
D. neglects to consider the results of governmental attempts in the past to limit tiger hunting(无关背景)
E. takes the removal of an impediment to the tigers’ survival as a guarantee of their survival
这里，e无疑是最好的选项，但想探讨一下其他几个，
我认为a也可起到weaken的作用，制定了规矩，得不到有效执行，也同样达不到目的，怎样才能有效的排除a呢？ | 
