The detective story is sometimes called 'whodunit' because the reader has to work ..... who did it, who committed the crime.

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The detective story is sometimes called 'whodunit' because the reader has to work ..... who did it, who committed the crime. (*) in (*) out (*) off (*) over

This is a companion discussion topic for the original entry at https://english.best/questions/4024,the-detective-story-is-sometimes-called-whodunit-because-the-reader-has-to-work-___-who-did-it-who-committed-the-crime/