An Investment Advisor Plans a Portfolio Your 85 Year Old $\mu$

An investment advisor plans a portfolio your 85 year old risk-averse grandmother. Her portfolio currently consists of 60% bonds and 40% blue chip stocks. This portfolio is estimated to have an expected return of 6% and with a standard deviation 12%. What is the probability that she makes less than 0% in a year? [A portion of Appendix B1 is given below, where z = (x - $\mu$ , with $\mu$ as the mean and $\sigma$ as the standard deviation.]

A) 2.28%
B) 6.68%
C) 15.87%
D) 30.85%
E) 50%