Drug Enforcement Agency Agents Heard Uncorroborated Information That a Dodge

Drug Enforcement Agency agents heard uncorroborated information that a Dodge mini-motor home,parked on a shopping center parking lot,was being used by a person exchanging marijuana for sex.They watched Charles,accompanied by a juvenile,enter the motor home and then close the shades on all the windows.More than an hour later the juvenile left and the agents stopped and questioned him.The juvenile confirmed that he received marijuana for sex.Agents returned and knocked on the door.Charles came out.A search of the motor home by the agents at this time would be ruled as

A) invalid without a warrant.
B) invalid without the permission of Charles or a warrant.
C) valid because of the consent of the youth.
D) valid because the vehicle was mobile and not used as a residence.