In which scenario is the assumption considered most appropriate?

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An economist assumes everyone has identical incomes to analyze how taxes affect income distribution.An economist simplifies money to only coins when studying how inflation responds to money supply growth.An economist models trade advantages by considering a scenario with two individuals and two products.A physicist assumes a beach ball drops in a vacuum to calculate its falling speed.

Explanation

Option C is most reasonable because simplifying the model to two individuals and two goods allows economists to clearly illustrate the gains from trade without unnecessary complexity. The other assumptions oversimplify or misrepresent the phenomena they aim to study.