问题如下：
The following statements are about Jérôme Kerviel's activities at Société Générale except:
选项：
A.Mr. Kerviel established extensive unauthorized positions and created fake transactions.
B.Mr. Kerviel still engaged in fraudulent transactions, despite being sufficiently supervised.
C.Mr. Kerviel can make his activities not be detected using his knowledge of controls.
D.Mr. Kerviel did not follow the two-week vacation rule.
解释：
B is correct.
考点：法兴银行案例
解析：IBM Algo FIRST风险数据库中描述，Kerviel没有被充分的监督。
C use his knowledge of control是什么意思，不是只是因为他黑客技术强把交易都隐藏吗
