Concept:The correct word must fit the idea of lowering a currency's value.Explanation:To devalue a currency means to reduce its value compared to foreign currencies.The sentence talks about a country changing the worth of its currency five times in one year."Reduced" is too general, "revamped" means improved, and "defaced" means damaged on the surface.Thus, "devalued" is the most precise and appropriate choice.Answer:B. devaluedThe completed sentence is: "Within one year, that country has devalued its currency five times."