On June 30, 2021, Blair Industries had outstanding $80 million of 8% convertible bonds that mature on June 30, 2022. Interest is payable each year on June 30 and December 31. The bonds are convertible into 6 million shares of $10 par common stock. At June 30, 2021, the unamortized balance in the discount on bonds payable account was $4 million. On June 30, 2021, all the bonds were converted when Blair's common stock had a market price of $30 per share. When recording the conversion, Blair should credit paid-in capital-excess of par: OA. $16 million. OB. $24 million. OC. $12 million. OD. $20 million.