Nell Gives Big Al $50 in Return for Al's Promise

Nell gives Big Al $50 in return for Al's promise to defame Sara. Nell hopes to ruin Sara's chances at a promotion. Nell finds out that Al did not hold up his end of the agreement. Which of the following statements is true?

A) Nell can get the money back from Al through litigation.
B) Nell can get the money back and force Al to do as he promised.
C) Legally, Nell can neither get the money back nor force Al to do as he promised.
D) Nell can force Al to act through an appeal to the courts, but Al gets to keep the $50.