A Police Officer Is on Duty and Playing a Pick

Multiple Choice

A police officer is on duty and playing a pick -up game of basketball with some local teens as part of public relations.He is tapped to sit out while someone else goes in,and he sits on a bench near some backpacks.One of the backpacks was open,and he could see some white powder in a baggie and a pipe.How is he able to conduct a warrantless search at this point?

A) It was a consent search
B) It was a search incident to arrest
C) It was a plain-view search
D) It was a search based on exigent circumstances