Officer Allen Conducted an Investigation of Brian for Purchasing Stolen

Officer Allen conducted an investigation of Brian for purchasing stolen property which he resold at his jewelry store. Officer Allen, dressed in street clothes, went to Brian's store when it was open for business and spent an hour looking at items in the display cases. He did not ask Brian any questions and he did not buy anything. Officer Allen asked Judge Crawford for a search warrant for Brian's store. Judge Crawford signed a warrant that gave Officer Allen permission to check every item in the store for serial numbers and to run the serial numbers through the database that listed stolen property. Did Officer Allen conduct a search when he went to the store and looked at items in the display case?

A) Yes, he was there searching for evidence that Brian sold stolen jewelry.
B) Yes, Brian's store was private property.
C) No, he did not invade Brian privacy by looking at items on display for the public to view.
D) No, he did not remove anything from the display case.