问题如下图：
选项：
A. 
B. 
C. 
解释：
请问老师，这道题用前面一问算出来risk premium是4.3%，那么required rates of return用CAPM算出来，就大于9%。那risk premium是2%怎么计算出来的？
NO.PZ201512300100000305 问题如下 5. Common stoissues in the above market with average systematic risk are most likely to have requirerates of return: A.between 2 percent an7 percent. B.between 7 an9 percent. C.9 percent or greater. C is correct.Baseon a long-term government bonyielof 7 percent, a beta of 1, anany of the risk premium estimates thccalculaterom the givens (e.g., a 2 percent historicrisk premium estimate or 4.3 percent supply si equity risk premium estimate), the requirerate ofreturn woulleast 9 percent. Baseon using a short-term rate of 9 percent, C is the correchoice. the short-en yiel are 9 percent an10-yematurities, yiel are 7 percent.The geometric mereturn relative to 10-yegovernment bonreturns over 10years is 2 percent per year.这两句话是不是前后矛盾啊？还是说我理解错了
NO.PZ201512300100000305问题如下5. Common stoissues in the above market with average systematic risk are most likely to have requirerates of return:A.between 2 percent an7 percent.B.between 7 an9 percent.C.9 percent or greater.C is correct.Baseon a long-term government bonyielof 7 percent, a beta of 1, anany of the risk premium estimates thccalculaterom the givens (e.g., a 2 percent historicrisk premium estimate or 4.3 percent supply si equity risk premium estimate), the requirerate ofreturn woulleast 9 percent. Baseon using a short-term rate of 9 percent, C is the correchoice.beta=1怎么从题干看出来
NO.PZ201512300100000305 这题是不是4.3（上一小问题）*1+7%=11。3>9%
NO.PZ201512300100000305 请问 Baseon using a short-term rate of 9 percent, 这句是说此题中算re要用9%的短期无风险利率来算么？为什么？
NO.PZ201512300100000305 between 7 an9 percent. 9 percent or greater. C is correct. Baseon a long-term government bonyielof 7 percent, a beta of 1, anany of the risk premium estimates thccalculaterom the givens (e.g., a 2 percent historicrisk premium estimate or 4.3 percent supply si equity risk premium estimate), the requirerate ofreturn woulleast 9 percent. Baseon using a short-term rate of 9 percent, C is the correchoice.老师你好，不知道这道题题干中画红线的句子是什么意思？是如何得知ERP为2%的？以及β为1题目原文中也没有提及好像。
加油~