Officer Smith Uses a Thermal Imaging Device to Try to Detect

Multiple Choice

Officer Smith uses a thermal imaging device to try to detect if unusual heat is coming from Jones's house.He does not have a warrant.This conduct is

A) probably an illegal search because the officer needs a warrant in this case.
B) probably not illegal because this is not a search.
C) probably not illegal if Officer Smith in good faith believes he can do this.
D) probably not illegal because any heat coming from the house is in plain view.