Consider the following code snippet: int max_sum_rectangle(int arr[][3],int row,int col) { int left, right, tmp[row], mx_sm = INT_MIN, idx, val; for(left = 0; left < col; left++) { for(right = left; right < col; right++) { if(right == left) { for(idx = 0; idx < row; idx++) tmp[idx] = arr[idx][right]; } else { for(idx = 0; idx mx_sm) ______; } } return mx_sm; } Which of the following lines should be inserted to complete the above code?