An investor starts with $1 million and converts it to 0.76 million pounds, which is then invested for one year. In a year the investor has 0.7975 million pounds, which she then converts to dollars at an exchange rate of 0.72 pounds per dollar. The U.S. dollar annual rate of return earned was ________.

4.97 percent

5.27 percent

6.45 percent

10.76 percent

8.26 percent