What was the average annual rate of return on 3-month U.S. Treasury bills during the period 1990 to 2014? Select one: O a. 2.15% O b. 4.23% O c. 5.68% O d. 3.04%

What was the average annual rate of return on 3-month U.S. Treasury bills during the period 1990 to 2014? Select one: a. 2.15% b. 4.23% c. 5.68K d. 3.04% What was the average annual rate of return on 3-month U.S. Treasury bills during the period 1990 to 2014? Select one: a. 2.15% b. 4.23% c. 5.68% d. 3.04%