Answer:
Deborah would likely say that having a positive attitude in ballet is just as important as physical health. A positive attitude not only influences one's mental well-being but also impacts performance and perseverance in ballet training and performance. While making friends and having a supportive community can be beneficial, they might not directly correlate with success in ballet as much as physical health and a positive mindset do. Similarly, being famous or earning money may be byproducts of success in ballet, but they don't necessarily determine the quality of one's experience or performance. So, the most fitting answer would be:
B) physical health.