He was killed . . . . . . . . a highway man . . . . . . . . a dagger. A. by, with B. by, for C. in, for D. with, for

The correct answer is A. by, with.

The preposition “by” indicates the agent or cause of an action, while the preposition “with” indicates the instrument or means by which an action is carried out. In this case, the highway man is the agent who killed the victim, and the dagger is the instrument that he used to do so.

The other options are incorrect because they do not make sense in the context of the sentence. Option B, “by, for,” would imply that the highway man killed the victim for a reason, but there is no indication of this in the sentence. Option C, “in, for,” would imply that the victim was killed in a place that was designated for that purpose, but there is no indication of this in the sentence either. Option D, “with, for,” would imply that the highway man killed the victim with a reason, but there is no indication of this in the sentence either.