Great changes have taken place in the city ______.

A．in that she grew up

B．she grew up

C．in which she grew up

D．which she grew up

调查人员通过跟踪、记录被调查事物和人物的行为来取得第一手资料的方法是（）。

A.文案调查法

B.实地调查法

C.问卷调查法

D.实验调查法