In the context of transform-and-conquer, what does 'instance simplification' typically involve?
Please be aware that there will be point deductions for incorrect answers.
Employing dynamic programming to store intermediate results.
Reducing the problem to a different but related problem.
Changing the representation of the problem to make it easier to solve.
Transforming the problem into a simpler instance of the same problem.
Using a divide-and-conquer approach to break down the problem.
Applying a greedy strategy to simplify the problem.