Lawmaker: Raising taxes is not the only means of reducing government debt. The government’s stockpile of helium is worth 25 percent more, at current market prices, than the debt accumulated in acquiring and storing it. Therefore, by selling the helium, the government can not only pay off that debt but reduce its overall debt as well.

Which of the following is an assumption on which the argument depends?

A. The government has no current need for helium.

B. Twenty-five percent of the debt the government has accumulated in stockpiling helium is not an insignificant portion of the government’s total debt.

C. It is not in the lawmaker’s interest to advocate raising taxes as a means of reducing government debt.

D. Attempts to sell the government’s helium will not depress the market price of helium by more than 25 percent.

E. The government will not incur any costs in closing its facilities for stockpiling helium.

我感觉到D 和 E都可以。E似乎好些，请诸位大侠发表高见。

我感觉D更好。

E看起来是有些道理，但它用了“any costs”，就显得比较绝对。如果是很少的一点，对结果也没影响。

但D就不同了，它直接量化地说出helium市值降低25%，这样就什么账都还不上了。