Consider the following recursive implementation used to convert a decimal number to its binary equivalent: #include int arr[31], len = 0; void recursive_dec_to_bin(int n) if(n == 0 && len == 0) arr[len++] = 0; return; if(n == 0) return; __________; recursive_dec_to_bin(n/2); int main() int n = 100,i; recursive_dec_to_bin(n); for(i=len-1; i>=0; i--) printf("%d",arr[i]); return 0; Which of the following lines should be inserted to complete the above code?

Answer: Option C