Which of the Following Statements Is False

Which of the following statements is false?

A) Many practitioners analyze other financial characteristics of a firm, when they forecast betas.
B) U.S. Treasuries are never subject to interest rate risk unless we select a maturity equal to our investment horizon.
C) If a firm where to change industries, using its historical beta would be inferior to using the beta of other firms in the new industry.
D) When using historical returns to forecast future betas, we must be mindful of changes in the environment that might cause the future to differ from the past.