Business Suppose the government of South Island has fixed the value of its currency, the Islandia, at $0.50 per Islandia, but the market equilibrium value of the Islandia is $0.75 per New Peso. In order to maintain the official value of the Islandia the Central Bank of South Island must either _________ domestic interest rates or supply Islandia, which causes the supply of international reserves to _________. A Raise increase B Raise decrease C Raise remain unchanged D Lower increase E Lower decrease.