跪求大神解析一道逻辑题，下周一考试，，急急急！求顶置

下题选 A ， 我当初选的是C   我是读错题目了吗？ 跪求大神解析一下题目和选A 和 不选C 的理由。。顺便告诉我一下这种类型的算那种题型，该怎么考虑？ 求定制，让小伙伴们都能看到了解一下，发现在曼哈顿里面的解析办法感觉不怎么对。

Most of the world'ssupply of uranium currently comes from mines. It is possible to extract uranium from seawater, but the cost of doingso is greater than the price that uranium fetches on the world market.  Therefore, until the cost of extractinguranium from seawater can somehow be reduced, this method of obtaining uraniumis unlikely to be commercially viable.

Which of the followingwould it be most useful to determine in evaluating the argument?

(A) Whether the uranium in deposits on land is rapidly beingdepleted

(B) Whether mosturanium is used near where it is mined

(C) Whether there areany technological advances that show promise of reducing the cost of extractinguranium from seawater

(D) Whether the totalamount of uranium in seawater is significantly greater than the total amount ofuranium on land

(E) Whether uraniumcan be extracted from freshwater at a cost similar to the cost of extracting itfrom seawater