题目：
All else being equal, a decrease in volatility of the underlying is most likely to result in a(n):（）
A. increase in call price and a decrease in put price.
B. decrease in call price and a decrease in put price.
C. increase in call price and a increase in put price.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B
