George and Jill Are Husband and Wife, Ages 67 and 65

George and Jill are husband and wife, ages 67 and 65 respectively.During the year, they receive Social Security benefits of $4,000 and have adjusted gross income of $11,000.Assuming they file a joint return, their tax credit for the elderly, before considering any possible limitation due to their tax liability, is:

A) $1,125.
B) $750.
C) $450.
D) $375.
E) None of the above.