[Third-Party Woes] Jaya Owed Bobby $40 for a Book She

[Third-Party Woes] Jaya owed Bobby $40 for a book she purchased from him. Jaya mowed Laura's yard for $40 and made an agreement with Laura that Laura would pay Bobby for the book. Bobby was not aware of the assignment. Laura did not pay anyone. Jaya also mowed Ken's yard for $40. She agreed with Ken that Ken would give the payment to Bianca, representing Jaya's birthday present to Bianca. Ken later refuses to do so, saying that promises to give gifts are not enforceable. Ken then moved out of town. Jaya told both Bobby and Bianca that she was broke and that they would have to recover any amounts due directly from Laura and Ken, respectively. Bianca was very unhappy because she wanted to buy a new pair of sandals with the money.
-Which of the following would be the likely result if Bobby sues Jaya for the $40 she owes him for the book?

A) Bobby will win because Jaya cannot avoid her obligations through a delegation.
B) Bobby will win but only because he was not aware of the assignment.
C) Bobby will win but only because the contract was for an amount under $1,000.
D) Bobby will win only if Laura cannot be found for service of process.
E) Jaya will win because she delegated the duty of payment to Laura.