The "Prior Valid Intrusion" Requirement of the Plain View Doctrine

The "prior valid intrusion" requirement of the plain view doctrine means that _____.

A) the suspect did not intrude into anyone else's reasonable expectation of privacy
B) the officer did not violate the Fourth Amendment in arriving at the place from which he could perceive the evidence
C) the officer did not intrude into anyone's reasonable expectation of privacy
D) the suspect intruded into the victim's privacy thus justifying the officer's intrusion into the suspect's privacy