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The correct option isC.Tradeallows specialization, which reducescosts.We often hear about howtrademakes us all better off because of thespecializationthat it creates. A country will concentrate on producing goods andservicesin which it has a comparative advantage, allowing it to gain a greater level of consumption than it would if it produced all goods and services at home.A country can specialize in certain goods throughtrade. Doing so typically increases thecostof thesegoodsbecause, since they are being produced by just one country, they can't be made cheaply and quickly.However, this increasedpricelowers the prices for other goods that come from outside countries. It's a win-win situation! Increased costs for some products allow for lower prices for others; people have morechoiceswhen it comes to where their products come from.They can also get more specialized items from only one country if they choose not to import them: They would be less likely to have any trouble withdeliveryandqualitycontrol.Specialization is allowed by trade, which reduces costs. But When countries stoptradingwith each other, they start producing all of their own goods.That means every singleproductmust be manufactured at home. The process takes longer and makes everything moreexpensive--even though there is no extra shipping involved. The result? Even worse economic problems than before!To learn more aboutTraderefer:brainly.com/question/27622280#SPJ4...