Susan Invites Her Brother Ralph and Sister Sarah,along with Their

Susan invites her brother Ralph and sister Sarah,along with their family members,to a surprise birthday party for their mother.Both siblings agree to come and also agree to provide certain beverages,salads,and dessert.At significant expense,Sarah arranges to hire a live band as entertainment as well as a clown to provide face painting and balloon animal making for the kids.Her brother and sister fail to show up for the party.Sarah is extremely upset and commences an action against them for breach of contract seeking damages for the costs she paid to the band as well as to the clown.Her court action will likely:

A) fail because the contract was not reduced to writing.
B) fail because contracts which in any way involve minors are unenforceable.
C) succeed because all of the essential elements of a valid contract exist.
D) succeed because her brother and sister did not provide prior notice that they were not going to attend.
E) fail because where domestic relations are involved,there is a presumption at law that there was no intention to be legally bound and as such there is no legally enforceable agreement.