In 2018, Peggy paid $1,500 in qualified adoption expenses to adopt a U.S. child. The adoption was not finalized, and in 2019, she paid an additional $2,500 in qualified adoption expenses. The adoption failed again in 2019 and never became final. What is the maximum amount Peggy may be eligible to claim for the Adoption Credit on her 2019 return?

$0 $1,500 $2,500 $4,000