单选题：What is the output of the following piece of code?

What is the output of the following piece of code? @[D](2)
```
int n = 9;
while (n > 6) {
n--;
printf("%d", n);
}
```
A. 8765
B. 9876
C. 987
D. 876



A.8765
B.9876
C.987
D.876


答案：D