问题描述：
[单选]
Which of the following is NOT reasonable and necessary post-trade checking？ 以下哪項不是合理和必要的交易後之監控？
A．large orders / trades 大額交易
B．withdrawal of sales proceeds 沽貨後提款
C．unusual price movement 不尋常的價格走勢
D．frequent order cancellations 頻繁取消交易
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答案解析：无
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上一篇：Which of the following will the eligible stock for margin trading be suspended？ 以下哪項導致個別合資格股票的孖展買賣被暫停？
下一篇：Which of the following is prohibited under all applicable laws with regard to the Northbound trading of China Connect Securities and B -Share？ 有關滬港通/深港通證券北向交易及中國B股的所有適用法律法規均禁止以下哪一項？
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