According to the Supreme Court in Katz V

According to the Supreme Court in Katz v.U.S. ,involving an electronic listening and recording device attached to the outside of a public telephone booth:

A) the Fourth Amendment protects people,not places.
B) a subjective expectation of privacy confers the Fourth Amendment's protection.
C) there is no search unless there has been a physical intrusion into a place.
D) eavesdropping on a public phone booth is not a search.