Suppose the U.S. Treasury issued $50 billion of short-term securities and sold them to the public. Other things held constant, wh would be the most likely effect on short-term securities' prices and interest rates? A. There is no reason to expect a change in either prices or interest rates. B. Prices and interest rates would both decline. C. Prices and interest rates would both rise. D. Prices would decline and interest rates would rise. E. Prices would rise and interest rates would decline.