Myra's neighbor, a little boy, practices his saxophone loudly and annoyingly. According to the overjustification effect, if Myra wants to get him to quit playing, she should

pay him to play and then offer him less

Explanation:

Music can be done not enjoyed when it's pleasing to not only the hearers but those around listening. Once it becomes a nuisance to the listeners it might no longer be categorized as just a sound but a noise. The best way Myra can keep the neighbor from either not playing the music or reduce the sound is for her to pay him to play and then offer him less.

credit card number 4 is the right answer