Which of the following choices is not the example of metonymic l

Which of the following choices is not the example of metonymic linguistic expressions?
A、America doesn't want another Pear Harbor.
B、We've gotten off the track.
C、We need some good heads on the project.
D、The White House isn't saying anything.
【正确答案】：B
【题目解析】：We've gotten off the track.属于隐喻性表达。