OG12 第七题

As its sales of computer products have surpassed those of measuring instruments , the company has become increasingly willing to compete for the mass market sales it would in the past have conceded to rivals.

这里是正确答案的样子。请教各位帮我分析一下句子成分，尤其是蓝色部分，我当时选择的是B选项，代词是they。指代的是market sales ,为什么不可以？蓝色部分是状语还是定语？

以前concede the market to rivals 的是the company.

所以代词应为it.