You have a porffolio with a standard deviation of 20% and an expected retum of 18%. You are considering adding one of the fwo socks in the following table. if atter adding tre stock you wil have 30% of your money in the new stock and 70% of your money in your existing portfolio, which one should you ado? Standard deviation of the portlolie with stock A is 1. (Round to two decimal places) Standard deviation of the portalio with stock B is 16. (Round to two decimal places) Which stock should you add and why? (Select the best cholce below) A. Add B because the portfolio is less risky when B is added. B. Add A since the portolio is less risky when A is added C. Add either one because both portolios ave equally risky