单选题 Of the five bill collectors at Apex Collection Agency, Mr. Young has the highest rate of unsuccessful collections. Yet Mr. Young is the best bill collector on the agency's staff. Which one of the following, if true, most helps to resolve the apparent discrepancy?

A、 Mr. Young is assigned the majority of the most difficult cases at the agency.
B、 The other four bill collectors at the agency all consider Mr. Young to be a very capable bill collector.
C、 Mr. Young's rate of collections per year has remained fairly steady in the last few years.
D、 Before joining the agency, Mr. Young was affiliated with the credit department of a large department store.
E、 (E) None of the bill collectors at the agency has been on the agency's staff longer than Mr. Young has.

【正确答案】 A

【答案解析】[解析] 要使Yong先生收款的成功率不高的事实能够支持Yong先生是最好的账单收款员的结论，就要找致使Yong先生收款的成功率不高的原因。在本题的5个选项中，只有(A)指出了Yong先生收款成功率不高是因为收款局的大多数最困难的事情都是派Yong先生去做的，这样不但本题中证据与结论之间的明显分歧得到了解决，而且证据还更有力地支持了结论。