Tuan and Marisa Are Married,file a Joint Return,and Have Two

Tuan and Marisa are married,file a joint return,and have two dependent children,Zack,age 6 and Aaron,age 5.Tuan has earned income of $72,000.Marisa was a full- time student for nine months) with no income.They paid a qualified day care center $5,000.How much is Tuan and Marisa's child and dependent care credit for the year?

A) $1,200.
B) $600.
C) $1,000.
D) $900.