Ginobili Company sells gift certificates redeemable only when merchandise is purchased. The certificates have an expiration date two years after issuance date. Upon redemption or expration, Ginobili recongnizes the unearned revenue as realized. Data for 2021 are as follows: On December 31, 2021, Ginobili Company should report unearned revenue at a. $2,500,000 c. 1,000,000 b. 2,200,000 d. Nil