In the divide-and-conquer approach, what is the primary role of the 'conquer' step?
Please be aware that there will be point deductions for incorrect answers.
To reduce the problem size in each iteration.
To solve each of the smaller subproblems, typically recursively.
To combine the solutions of the subproblems.
To apply a greedy strategy for quick solution finding.
To optimize the solution for each subproblem.
To divide the problem into smaller subproblems.