You have a portlolio with a standard deviation of 25% and an expected return of 16%. You are considering adding one of the two atocks in the following table. If affer adding the stock you will have 20% of your money in the new stock and 80% of your monoy in your existing portfolio, which one should you add? Standard deviation of the pertfolio with slock A is 15. (Round to two decimal plases.) Standard deviation of the portolie with stock 8 is 5. (Round to two decimal places) Which stock should you add and why? (theledt the bent choice below) A. Add A because the portfoso is less riky when A is adsed B. Add B because the portolo is less nisy when B is added c. Mdd ether one because bosh portolios are equaby fisky