What Is Needed to Establish That Government Action Is a Search

Multiple Choice

What is needed to establish that government action is a search?
I. societal recognition that a personal expectation of privacy is reasonable
II. actual physical trespass into an area
III. mere governmental intent to conduct a search
IV. the exhibition of a personal subjective expectation of privacy

A) II, III
B) I, IV
C) II, IV
D) All the above