When an Officer Saw a Woman Driving Down the Street

When an officer saw a woman driving down the street under circumstances that appeared to be a bit unusual given the time of day and the location of her travel, but there was no visible criminal activity, the officer may:

A) stop the vehicle when he finds that the license plate does not belong to the vehicle.
B) stop the vehicle and make a search of the interior of the car because more evidence of criminal activity might be found.
C) stop the vehicle and initiate a search of the whole vehicle even in the absence of probable cause because persons operating vehicles have a reduced or lower expectation of privacy than when a in his or her home.
D) not stop the vehicle if there is no visible or suspected criminal activity.