Answer:
Probably Lurking
Explanation:
Lingering means that they had a reason to be there and then as they went to leave they were kind of just not leaving, dawdling is making one's way slowly out which this guy in the doorway is not doing.
It would be lurking because he is simply standing in the doorway with an unknown interest in a very suspicious and questionable way.
Its not tarrying because there is no context evidence that proves he is delaying to be late for something, and the text specifically says he is suspicious
(If this is correct, i would appreciate branliest)
