The Story He Told the Police Differed from the One He Told His Mother

The story he told the police 'differed' from the one he told his mother.

C. differed (meaning "different", indicating that the two stories were not the same)

This sentence is a simple subject-verb-object sentence. 'The story' is the subject, 'he told' is the verb, and 'the police/from the one he told his mother' is the object.