Nikko is a pre-school teacher. He loves to have his students do balance exercise as part of their fitness program. The kids really enjoy them, but his supervisor asks him why he is giving such young children this exercise. What is the BEST response to Nikko's supervisor?
A. Balance is great for coordination and reaction times.
B. Any time that preschoolers are exercising, it is a good thing.
C. Balance exercise require a lot of extra equipment, but it's worth it.
D. Younger children are the age group that most need to develop balance.