Year-to-date, Oracle had earned a 15.0 percent return. During the same time period, Valero Energy earned -12.96 percent and McDonald's earned 1.80 percent. If you have a portfolio made up of 50 percent Oracle, 10 percent Valero Energy, and 40 percent McDonald's, what is your portfolio return?

6.14 percent

4.86 percent

5.86 percent

6.92 percent