Which of the followings is correct? Question 11 options:

a) The slope of the SML is determined by the value of beta.

b) The capital market line is all linear combinations of the risk-free asset and the market portfolio.

c) We will almost always find that the beta of a diversified portfolio is less stable over time than the beta of a single security.

d) In portfolio analysis, we often use ex ante (future) returns and standard deviations, despite the fact that we are interested in ex post (historical) data.