Which of the following is correct?

If a stock has a beta of 1, then its required rate of return must be the same as the whole stock market.

If a stock has a beta of 1, then its required rate of return must be the same as a risk-free security.

If a stock has a beta of 0, then its required rate of return must be 0.

If a stock has a beta of 2, then it is too risky to be worth purchasing.

None of these.