Concept:A trade barrier restricts imports, which shifts consumer spending toward domestic products.Explanation:When a country imposes a barrier such as a tariff or quota, imported goods become more expensive or limited in supply.Consumers then find locally produced goods more affordable and available.This leads to a rise in demand for goods made within the country.Thus, trade barriers generally protect local industries by boosting their market.Answer:C. an increase in the demand for locally produced goods