Question

When researching a problem, why would it be worthwhile to examine past solutions?

to ensure that new solutions are unique
to identify every potential failure that may occur
to prove that past solutions are the best solutions
to see how the problem has been approached before

Answer 1

Correct answer: "to see how the problem has been approached before."

Reason: reviewing past solutions shows what methods worked, what failed, common pitfalls, and gaps you can build on. The other options are off-target: examining past work can help avoid duplication but won't guarantee uniqueness; it can reveal many failures but not every possible one; and it doesn't by itself prove past solutions are the best.