Hayden Oldham was deployed in a combat zone for all of 2019. He is married and has two children. Hayden's nontaxable combat pay in 2019 is $24,000. His wife worked part-time while Hayden was deployed and earned $9,000. What is the maximum amount of earned income the Oldhams can report for Earned Income Tax Credit (EITC) purposes in 2019?

$33,000

$24,000

$15,000

$9,000