Select the most appropriate meaning of the highlighted idiom.
We prefer going to movies once in a blue moon.

Correct option is A

The correct meaning of the idiom "once in a blue moon" is (a) very rarely.
· " Once in a blue moon" is an idiom that describes an event that happens infrequently. This expression is used to signify something that does not occur often.
· Example: We only see each other once in a blue moon since he moved abroad.