Which of the following would be considered the highest risk portfolio:
a. a portfolio made up of 20% savings accounts, 50% mutual funds, and 30% bonds
b. a portfolio made up of 40% mutual funds, 40% treasury bonds, and 10% stocks
c. a portfolio made up of 60% stocks, 30% mutual funds, and 10% treasury bonds
d. a portfolio made up of 70% mutual funds, 10% stocks, and 20% treasury bonds