Jaworsky, the driver of a vehicle, and Bigelow, a passenger in that car, were both injured in an automobile accident caused by the negligence of Thornton, the operator of another vehicle. Jaworsky and Bigelow are both allowed to sue Thornton in the same complaint because of the law regarding ________
o permissive joinder
o compulsory joinder
o class actions
o indispensable parties
