单选题：The output of this program is ( ).

The output of this program is ( ). @[B](2)
```
#define add(a,b) a+b
int main(){
printf("%d\n",5*add(3,4));
return 0;
}
```
A. 35
B. 19
C. 0
D. Syntax error




A.35
B.19
C.0
D.Syntax error


答案：B