What happens when you attempt to compile and run the following code?
A. compilation error
B. program outputs: 1 2 3 4 5 6 7 8 9 10 9 8 7 6 5 4 3 2 1
C. program outputs: 1 2 3 4 5 6 7 8 9 10 10 9 8 7 6 5 4 3 2 1
D. program outputs: 1 2 3 4 5 6 7 8 9 10