This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to encourage a child to practice the piano
Attack the problem directly.
If you aren't afraid of ending up beating a dead horse, feel free to try this way.
Make sure you explain to your child, how important practicing piano is.

Available options:
I. Explaining how it's a routine and what practicing piano can be may help them understand the importance. The easiest way to convince them is to remind them, by teasing him or her, how practicing piano is a hobby, not an activity.
II. Never ignore your child in a difficult situation, and try to protect him from it by joining in with his learning and practice sessions. Love your child unconditionally.
III. Tell them that if they practice, they will get better, and that being able to play the piano will open many doors for them once they are older. Have your child practice for a certain short amount of time each day, soon it will become a habit.
IV. Ask them if they want to ensure the state of mind they want to take time off from their job. Get them to fine tune their instrument so that you've kept up with their schoolwork.
The answer is:
III.