单选题 The passage indicates that some companies use telephone selling because ______.

A、 they have too many sales people
B、 their sales people don' t like travelling
C、 it saves time
D、 it is more polite

【正确答案】 C

【答案解析】[精解] 题干意为“本文表明一些公司利用电话进行销售，是因为…”。该题为细节题。由第三段第二句、第三句“Much of the sales people’s time is spent unproductively traveling．Telephone selling may use this time more productively．．．”可以看出电话销售可以更有效地利用这些时间。