4. Of the following four investments, is considered the least risky. conside A. Treasury bills B. corporate bonds C. U.S. agency issues D. Treasury bonds E. commercial paper 5. To earn a high rating from the bond rating agencies, a firm should have A. a low times interest earned ratio. B. a low debt to equity ratio. C. a high quick ratio. D. a low debt to equity ratio and a high quick ratio. E. a low times interest earned ratio and a high quick ratio. 6. At issue, coupon bonds typically sell A. above par value. B. below par C. at or near par value. D. at a value unrelated to par. E. None of the options