A year ago you invested in a corporate bond. Today you compute your total return from that investment and realize that although you earned a positive nominal return, your real return was negative. This means that O A. although you realized negative capital gain on your investment, your income from coupons was positive O B. although you realized positive capital gain on your investment, your income from coupons was negative O C. although you lost money, your investment gained some purchasing power over the year OD. although you gained money, your investment lost some purchasing power over the year