Nina, who is single with a modified AGI of $87,500, is sending her son to his first year of college. The total tuition and related payments during the year amounted to $15,000. Nina has not taken advantage of any other type of tax benefit related to educational expenses. Her American Opportunity Tax Credit is? Show work.

A) $0.

B) $625.

C) $1,125.

D) $2,500.