operate margin

问题如下：

Nakiska started the meeting:

I suggest we use the current rate method for both our non-domestic subsidiaries because that will simplify our financial reporting. The current rate method also allows the key metrics we use to evaluate performance—the current ratio, fixed asset turnover, and operating margin—to be the same after translation as they are before.

Nakiska's comment about the key performance metrics is least accurate with respect to the:

选项：

A.

current ratio.

B.

fixed asset turnover.

C.

operating margin.

解释：