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 --;
}