答案：A

题目分析：句意：她以为，那些说照顾孩子是很容易的赚钱方式的人显然没有遇到过这种调皮捣蛋的男孩。who said looking after children was an easy way to make money obviously是定语从句修饰those，根据said 和thought可知，本句用过去完成时，表示在said之前的动作。B. didn't meet是一般过去时；C. haven’t met 是现在完成时；D. wouldn’t meet过去将来时。由句意可知选A。

考点: 考查动词时态的用法。