Which of the following are reasons why investors are not compensated for unsystematic risk? 1. Investing in 20-30 stocks in many different industries will eliminate diversifiable risk. II. The transaction costs of diversification are very small III. All risk can be eliminated through diversification. IV. It is very easy to eliminate a firm's unique risk. Multiple Choice I and IV only Il and ill only 1. II and IV only 1, Ill and IV only