How many times is ‘a’ printed when the following C code is executed?

[answerhappygod]

#include<stdio.h>
main()
{
int a;
a=f1(10);
printf("%d",a);
}
f1(int b)
{
if(b==0)
return 0;
else
{
printf("a");
f1(b--);
}
}
a) 9 times
b) 10 times
c) 0 times
d) Infinite number of times