Final answer:
Forcing Schuyler to practice for hours each day is the least beneficial strategy for Schuyler's parents to encourage violin playing, as it could create negative associations and resistance to practice.
Step-by-step explanation:
The strategy that is LEAST beneficial for Schuyler's parents to use to get Schuyler to play the violin is c) Forcing Schuyler to practice for hours each day. This approach is likely to be met with resistance and could lead to negative associations with the instrument and practice itself. On the other hand, strategies such as offering rewards for practicing, allowing Schuyler to choose the type of music to play, and creating a positive and supportive practice environment could encourage Schuyler to play the violin in a more positive and engaging manner.
These align with the principles seen in modern psychology and parenting techniques, which favor reinforcement over punishment, showing that rewarding positive behavior is often more effective than forcing participation.