Answer this question based on the following efficient frontier: ER Efficient Frontier D Standard Deviation 1. Portfolio C is the tangency portfolio because it has the lowest standard deviation 2. Portfolio D is not chosen by risk averse investors. 3. Portfolio B is attainable because it has the highest ER. O a. Only 1 is correct. O b. Only 2 is correct. Oc. Only 3 is correct. O d. Both 1 and 3 are correct. O e. Both 1 and 2 are correct