OG12-86 请教which的指代问题

xiaoguolulu

正解C选项，整句如下：
The results of the company's cost-cutting measures are evident in its profits, "which have increased 5 percent during the first 3months of this year after falling" over the last two years.

我想问下，which前面有逗号隔开，那which会不会指代不清呢？怎么知道which一定是就近指代profits，而不是指代逻辑主语 the results呢？而且which使用就近指代原则时，which与被指代物中间不是不能用逗号隔开吗？

bababa11111

which一定是就近指代!!!!!!