Watch out Ally, Psych taught me how to increase your Motivation in Piano

Fareed wants to encourage his young daughter to play the piano. However, she seems to happily practice the piano everyday because, apparently, she likes to produce music. According to research in motivation, what is the best approach for Fareed?
1) Fareed should offer his daughter praise and positive feedback but not offer her concrete rewards every time she practices.
2) Fareed can further enhance his daughter’s enjoyment and lengthen her practice time by providing some concrete reward for practicing, such as quarters for her piggy bank.
3) Fareed should withhold concrete rewards, such as surprising her with a special reward for mastering a particularly difficult piece of music, until she needs more encouragement.

Now which one is right?