求助GMAT LSAT LR中T23 SII两道题目

Five thousand of the 50,000 books published in country Z in 1991 were novels. Exactly 25 of the films released in country Z in 1992 were based on those novels. Since 100 films were released in country Z in 1992, no more than one-quarter of them were based on books published in country Z in 1991.

Which one of the following, if assumed, allows the conclusion above to be properly drawn?

(A) None of the scripts used in films released in 1992 were written by professional novelists.

(B) None of the films released in country Z in 1992 were based on books other than novels.

(C) None of the books that were published in country Z in 1992 were based on plots of films released in 1991.

(D) Some of the films released in country Z in 1992 were based on older films that had been released for the first time many years earlier.

(E) Some of the films released in 1991 in country Z were based on novels that were published in 1991.

答案是B。我选的是C。认为如果要支持四分之一的书来自于书的出版应该是说这些书没有其他的来源。答案给的是C。请NN解答一下。

Construction contractors working on the cutting edge of technology nearly always work on a “cost-plus” basis only. One kind of cost-plus contract stipulates the contractor’s profit as a fixed percentage of the contractor’s costs; the other kind stipulates a fixed amount of profit over and above costs. Under the first kind of contract, higher costs yield higher profits for the contractor, so this is where one might expect final costs in excess of original cost estimates to be more common. Paradoxically, such cost overruns are actually more common if the contract is of the fixed-profit kind.

Which one of the following, if true, most helps to resolve the apparent paradox in the situation described above?

(A) Clients are much less likely to agree to a fixed-profit type of cost-plus contract when it is understood that under certain conditions the project will be scuttled than they are when there is no such understanding.

(B) On long-term contracts, cost projections take future inflation into account, but since the figures used are provided by the government, they are usually underestimates.

(C) On any sizable construction project, the contractor bills the client monthly or quarterly, so any tendency for original cost estimates to be exceeded can be detected early.

(D) Clients billed under a cost-plus contract are free to review individual billings in order to uncover wasteful expenditures, but they do so only when the contractor’s profit varies with cost

(E) The practice of submitting deliberately exaggerated cost estimates is most common in the case of fixed-profit contracts, because it makes the profit, as a percentage of estimated cost, appear modest.

答案D。我在做题的时候是用排除法选出来的。但是我没有明白。所以请大家解答一下。