Tai and Song Are Ages 69 and 59,respectively,and File a Joint

Tai and Song are ages 69 and 59,respectively,and file a joint return.They have AGI of $20,000 and received $2,000 in nontaxable social security benefits.How much can Tai and Song take as a credit for the elderly or the disabled?

A) $2,000.
B) $1,125.
C) $7,500.
D) $0.