First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models. Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.
问题分析：此题为归纳题，正确答案中不能出现与原文无关的内容，我们来看看选项A说竞争对手的事情，明显无关，杀。B 说购买其他产品例如打印机，这个内容原文没有涉及到，排除！C 又是围绕竞争对手谈的，和A错误的原因类似，排除。D 整体说的是购买电脑人数问题，没有出现和原文无关的内容，留着。E 说去年和前年比，电脑成本哪个高，文章围绕的是两种不同的人购买电脑这个信息，没有提到不同年份成本对比的问题，又一次出现与原文无关的内容，排除。
