Eager to get thin,Ruth has decided to ____ meat entirely for three years at least.

问题描述:

Eager to get thin,Ruth has decided to ____ meat entirely for three years at least.
A.cut out B.cut off
请说出详细原因。

cut out [口语]戒除,停止服/使/食用:
I have decided to cut out smoking and drinking.
我已决定戒烟戒酒.