Which is the best explanation of the idiomatic expression "an axe to grind"?

A. Someone who stands out

B. Anything irritating

C. A problem to resolve

D. A faulty instrument

The meaning of have an axe to grind is:

The definition of have an axe to grind is:

(idiom) to have a problem with something or someone

Example Sentences:

I have an axe to grind with my roommate because she’s always borrowing my clothes without asking!

The student had an axe to grind with his teacher, because he received a low mark on his presentation.