Which of the following statements is true? Group of answer choices a. Asset prices and average expected rates of return are directly related, but levels of nondiversifiable risk and average expected rates of return are inversely related. b. Asset prices and average expected rates of return are inversely related, but levels of nondiversifiable risk and average expected rates of return are directly related. c. Asset prices, average expected rates of return, and levels of nondiversifiable risk are all directly related. d. Average expected rates of return are inversely related to both asset prices and levels of nondiversifiable risk.