Historical returns. Calculate the arithmetic average return of U.S. Treasury bills, long-term government bonds, and large-company stocks for 1986 to 1995. Which had the highest return? Which had the lowest return? Click on "Get more help" menu, then select "Spreadsheet" to see Table 8.1-Year-by-Year Returns, 1950-1999. What is the average return of U.S. Treasury bills for 1986 to 1995? % (Round to two decimal places.) What is the average return of long-term government bonds for 1986 to 1995? % (Round to two decimal places.) What is the average return of large-company stocks for 1986 to 1995? % (Round to two decimal places.) Which investment had the highest average return for 1986 to 1995? (Select the best response.) A. U.S. Treasury bills B. Large-company stocks C. Long-term government bond Which investment had the lowest average return for 1986 to 1995? (Select the best response.) A. Large-company stocks B. Long-term government bond C. U.S. Treasury bills