You are looking at investing in investment grade bonds. Which of the following is NOT a property of investment grade bonds? Select one: a. The bonds are rated at a rating of BB or Ba and above, b. The bonds have a lower default rate than bonds classified as junk c. The bonds have a higher default rate than US Treasury Bonds. O d. Investment grade bonds have a higher yield than U.S. Treasury Bonds. e All of the above are properties of investment grade bonds