Damion, a single dad who will use the head of household filing status, has three children, Dominic (5), Julian (9), and Elijah (16). Damion's adjusted gross income is $72,000, and his 2021 tax liability is $6,103. All three children have valid social security numbers, are U.S. citizens, and are his qualifying child dependents. Damion did not receive any advance Child Tax Credit payments during the year. Neither Damion nor the children's mother have ever signed Form 8332, Release/Revocation of Release of Claim to Exemption for Child by Custodial Parent. What amount is Damion able to claim for the total of his Child Tax Credit and credit for other dependents when he files his 2021 return?

a. $6,103

b. $6,000

c. $9,000

d. $9,600