What does the following C function do?
```
int
fun(const char *string)
{
char blank = ' ';
int k;
int looking = 1;
k = strlen(string);
while (k >= 0 && looking) {
if (string[k] == blank)
--k;
else
looking = 0;
}
if (looking)
return (-1);
else
return (k);
}
```
a. It finds the subscript of the first nonblank character in string.
b. It finds the subscript of the last nonblank character in string.
c. It counts the nonblank characters in string.
d. It finds the subscript of the first blank in string.
e. It finds the subscript of the last blank in string.
b. It finds the subscript of the last nonblank character in string.
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