In the following questions, four alternatives are given for the idiom / phrase and bold italicised in the sentence. Choose the alternative which best expresses the meaning of the idiom / phrase.

It is difficult to have a sensible discussion with her as she flies off at a tangent.

A. gets carried away

B. starts discussing something irrelevant

C. loses her temper easily

D. does not really understand anything

Please do not use chat terms. Example: avoid using "grt" instead of "great".