问题

Mary’s QQ number must have been stolen by someone else yesterday, _____ Because she asked me to lend her ¥5,000, _____ had never happened before.
A:didn’t it that
B:haven’t it which
C:wasn’t it which
D:wasn’t it it
B:haven’t it which
C:wasn’t it which
D:wasn’t it it
正确答案是: