First of all, I would double check if indeed it´s a multi-stage case, since normally they start just with one question -precisely, to avoid this kind of confusion in the candidate-
Secondly, be careful with the frameworks, particularly in thiese cases in which the right answer would be a combination of multiple ones. Frameworks are useful to learn methodologies of "how to solve X kind of problem", not to place them there by heart. Imagine how many candidates would have done that before... would not impress the interviewer.
Hope it helps!