Standard devation of the portfolio with stock A is (Pound to two docimal places) Standart devason of the portolio wth stock B is Wh (Pound to fwo docimal places) Which slock should you add and wry? (Selvet the bett choice below) A. Add B becalise the porticlio is less riby when B is added D. Add A because the portiolio is less rishy when A is added C. Add oither ons becanise both portlolions are epanty nisky