问题如下：
Zhang remembers learning about the weighted harmonic mean. She decides to calculate the weighted harmonic mean for the index and makes the following statement to support her decision:
“The harmonic mean can be used to mitigate the effects of both large and small outliers.”
Zhang’s statement to support using the harmonic mean is best described as:
选项：
A. incorrect with respect to large outliers
B. incorrect with respect to small outliners
C. correct
解释：
Zhang’s statement is incorrect with respect to small outliers. The harmonic mean tends to mitigate the impact of large outliers. It may aggravate the impact of small outliers, but such outliers are bounded by zero on the downside.
A is incorrect. The harmonic mean may aggravate the impact of small outliers, but such outliers are bounded by zero on the downside.
C is incorrect. The harmonic mean may aggravate the impact of small outliers, but such outliers are bounded by zero on the downside.
您好，可以解释下解析么，没有看明白答案。
