In calculating a firms beta, it is possible to get a variety of different yet equally valid results. Which of the following is false regarding this fact?

It is reasonable to choose to measure stock returns against the DJIA, S&P500, NASDAQ, or some other broad-based market index.

It is reasonable to choose from among a variety of sampling lengths (e.g., months or years) and/or frequencies (e.g., monthly or weekly).

It is reasonable to choose to measure stock return premiums and market return premiums using either corporate bonds or Treasury bonds.

It is reasonable to choose to measure stock return premiums and market return premiums using either corporate bonds or Treasury bonds.