When the Federal reserve uses contractionary monetary policy to reduce​ inflation, it A. sells treasury securities increasing interest​ rates, leading to a stronger dollar that lowers net exports in an open economy. B. buys treasury securities increasing interest​ rates, leading to a weaker dollar that increases net exports in an open economy. C. buys treasury securities decreasing interest​ rates, leading to a weaker dollar that lowers consumption of durables in a closed economy. D. sells treasury securities decreasing interest​ rates, leading to a stronger dollar that lowers domestic investment in a closed economy.