Which one of the following statements is NOT true? Select one: A. The risk that the lender may not receive payments as promised is called default risk. B. Investors must pay a premium (a higher price) to purchase a security that exposes them to default risk. C. Australian government securities are assumed not have any default risk and are adopted as the best proxy measure for the risk-free rate. D. The greater the risk of an investment, the greater the return that investors require