You put half of your money in a stock portfolio that has an expected return of 14% and a standard deviation of 30%. You put the rest of your money in a risky bond portfolio that has an expected return of 6% and a standard deviation of 15%. The stock and bond portfolios have a correlation of .55. The standard deviation of the resulting portfolio will be ________________. Group of answer choices

A: equal to 15%

B: more than 18% but less than 24%

C: More than 12% but less than 18%

D: equal to 18%