The success of her business made it difficult for her to carry out heras wife and mother.A

问题补充：

The success of her business made it difficult for her to carry out heras wife and mother.

A. model

B. example

C. work

D. role

答案：

A. model

B. example

C. work

(答案→)D. role

解析：句意为：事业的成功，使得她很难履行妻子和母亲的义务。