Bill is leaving work when a co$-$worker asks him to drop off a package at the post office on his way home.

The co$-$worker explains that he must work late and can't get to the post office before it closes. Bill stops at

the post office and is met by police officers with drug$-$sniffing canines who discover the package his co$-$

worker gave him contains cocaine.

Bill would not be guilty of a crime in most states, because most states require

constructive possession

knowing possession

mere possession

concurrent possession