Finanacial Expert help needed!!!!

Need help on this question with the proper explanation. why its happening and why those options are decresing the shareholders required rate of return?

68. Which of the following would decrease shareholders' required rate of return? 1. An increase in the firm's growth rate, 2. An increase in the firm's systematic risk premium, 3. An increase in the firm's beta, 4.An increase in the market portfolio rate of return A. None of the given answers is correct. B. 1,2 and 3 C. 1,2 and 4 D. 2.3, and 4I E. 1and2 F. 2 and 4