In passage 2, the plot event that best supports the theme that things are not always what they seem is B. Piper's adjustment to her response upon meeting the man.
This refers to the central message that an author wants to convey to his audience about a particular story that is usually didactic.
Hence, we can see that from the complete text, there is the narration of the interaction Piper has with a stranger and how she was unsure and adjusted her response and this event is used to support the theme.
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