Which of the Following Statements Is False

Which of the following statements is false?

A) Beta is the expected percent change in the excess return of the security for a 1% change in the excess return of the market portfolio.
B) Beta represents the amount by which risks that affect the overall market are amplified for a given stock or investment.
C) It is common practice to estimate beta based on the historical correlation and volatilities.
D) Beta measures the diversifiable risk of a security, as opposed to its market risk, and is the appropriate measure of the risk of a security for an investor holding the market portfolio.