What Strategies Are Likely to Be Most Effective in Teaching

What strategies are likely to be most effective in teaching a young child to throw a ball?

A) Playing a video of a professional baseball pitcher followed by discussion.
B) Allowing some exploration, then demonstrating followed by oral cues and practice.
C) Giving directions to children in large group followed by practice by pairs.
D) Providing small soft balls and waiting for the skill to emerge on its own.