Which of the following code segments produces the output "987654321" ? A. int num = 10; while (num > 0) { System (num); num --; } B. int num = 10; while (num >= 0) { System (num); num --; } C. int num = 10; while (num > 1) { System (num); num --; } D. int num = 10; while (num >= 1) { System (num); num --; } E. int num = 10; while (num <= 9) { System (num); num --; }