(35) Consider the following C++ function that uses a divide and conquer approach to calculate the sum of a range of numbers. Which of the following lines of code from the above function divides this problem into sub-problems? (A) int result = sum(i, mid) + sum(mid+1, j)； (B) int mid = (i+j)/ 2； (C) if(i==j){ (D) return result； (E) int sum(int i, int j) {