这题如果改成支持题 B也不是特别准确 因为文中说Last year PXC's profits from computer sales were substantially higher than the previous year 也没说 computer-related products算不算在内 有点模糊 但是方向对了 也沾边了 所以勉强算对
句尾的这句话: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.是最重要的,依靠这句话就可以排除C选项