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Auror Inc. issued 4% bonds on October 1, 2020. The bonds have a maturity date of September 30, 2030 and a face value of $300 million. The bonds pay interest each March 31 and September 30, beginning March 31, 2021. The effective interest rate established by the market was 6%. Auerbach issued the bonds: O At par. O At a premium. O At a discount Cannot be determined from the given information