题目：
An analyst does research about price-to-eamings ratio. With respect to price multipliers based on fundamentals, and all else being equal, an increase in which of the following inputs most likely will cause the price-to-earnings ratio to increase（）
A. Retention ratio.
B. Required rate of return.
C. Growth rate of eamings.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
