项目选址的市场潜力、人口素质等因素属于( )

A．自然因素
B．经济技术因素
C．地理位置因素
D．社会因素

An analyst does research about capital asset pricing model. Which of the following statements is most accurate The security market line (SML):（）

A. is a graphical representation of the capital asset pricing model that plots expected retum versus beta for any security.

B. includes all possible combinations of the risk-free asset and any risky portfolio.

C. includes all possible combinations of the risk-free asset and the market portfolio.