Great changes ______ in my  hometown in the  past few  years.[ ]

A. were taken place

B. took place 

C. have been taken place

D. have taken place

从所给四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性：（）。

A.A

B.B

C.C

D.D