Homer and Marge have been unable to have a baby. They decided last year that adoption would be the best choice for them. They believe that they can support a child that has special needs both financially and emotionally. Therefore, this year, they adopted Maggie, a four year old special needs child. They paid $9,000 in qualifying adoption expense for the current year. Their MAGI in 2017 is $170,000 and their tax due before the application of the qualified adoption credit is $13,570. What is Homer and Marge's available adoption credit for 2017?

A. $9,000.

B. $11,650.

C. $13,360.

D. $13,570.