In an open economy a decrease in the money supply? A) raises U.S. interest rates which lowers the value of the dollar which increases our imports. B) lowers U.S. interest rates which lowers the value of the dollar which decreases our exports. C) raises U.S. interest rates which raises the value of the dollar which decreases our exports. D) lowers U.S. interest rates which raises the value of the dollar which increases our imports.