问题如下：
Which of the following statements about short selling is most correct?
选项：
A.Short selling has little impact on market efficiency because of the disadvatage of short sell strategies.
B.Short selling can improve market efficiency by preventing the price of assets from becoming overvalued.
C.Short selling may result in excess volatility which can deteriorate market efficiency.
解释：
B is correct.
Short selling improves market efficiency. The sales pressure from short selling prevents the prices of assets from becoming overvalued.
请问C选项怎么翻译呀？
