Julie works at a factory that produces toy clowns. As the toy clowns come down the assembly line it is Julie's job to add a red nose to each clown as the last step in completing each toy. For every $100$ clowns Kelly completes, she receives $$10\mathrm{.}00,$ which is a$($n$)$

incentive reinforcement

negative reinforcement

primary reinforcement

positive reinforcement