问题如下：
Which of the following statements when a credit analyst considers a firm's credit quality is correct?
选项：
A. A frim's credit quality to be improving if the company reduces its scale and diversification.
B. A frim's credit quality to be improving if the company reduces its margin stability.
C. A frim's credit quality to be improving if the company reduces its leverage.
解释：
C is correct.
A frim's credit quality to be improving if the company reduces its leverage. both A and B is incorrect because the company need improved credit quality by larger scale, more diversification, higher operating efficiency, and more stable margins.
请问这个题目问的什么