NO.PZ2023021601000125
问题如下：
A Bollinger Band “squeeze” occurs when volatility:选项：
A.falls to low levels as the Bollinger Band widens. B.falls to low levels as the Bollinger Band narrows. C.rises to high levels as the Bollinger Band narrows.解释：
A Bollinger Band “squeeze” occurs when volatility falls to a very low level, as evidenced by the narrowing bands.可否翻译一下问题和选项？
