Jared Is a Stay-At-Home Dad Who Takes Care of His

Jared is a stay-at-home dad who takes care of his five-year-old daughter Olivia. Olivia is hyperactive and does not often listen to Jared. Jared is trying to find new ways to get his daughter to brush her teeth, which she always refuses to do. Jared has come up with the solution to give Olivia a sticker every three times she brushes her teeth without him telling her to.
-Jared wants to eventually get Olivia to brush her teeth without him giving her a sticker.What should he do to increase the probability that Olivia does not stop brushing her teeth after he stops giving her stickers

A) Give her a sticker every single time she brushes her teeth.
B) Give her a bigger reward than a sticker.
C) Give her a sticker after a variable number of times she brushes her teeth.
D) Continue doing exactly the same thing he is currently doing.