Rose Is Working Hard on Arlin's Mayoral Campaign

Rose is working hard on Arlin's mayoral campaign. She thinks that just a few more votes could win the election, so she promises to pay her friend Violet $50 if she will register and vote for Arlin. Violet does so, but Arlin loses the election, and Rose now refuses to pay. Rose's agreement to pay Violet:

A) is enforceable.
B) is unenforceable and opposed to public policy.
C) is an agreement to obstruct the administration of justice.
D) is an unconscionable contract covered by the UCC.