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.