[Kids' Debts] Marta Agrees to Buy Natasha's Convertible, but Marta

[Kids' debts] Marta agrees to buy Natasha's convertible, but Marta may be losing her job, in which case, her mother Lottie will pay pursuant to the terms of the contract Lottie signed. Jeb signs an agreement to pay for his son Byron's plastic surgery, if his son cannot afford the payments. Lucia agrees to sell her drumset to Marcus because Marcus' father said he will back the deal.
-Which of the following statements is true about the likelihood of the secondary obligations being enforced?

A) All of the agreements can be enforced because they are secondary obligations.
B) Since Lottie and Jeb signed agreements, those obligations could be enforced.
C) Marcus' father did not sign a writing, so the agreement cannot be enforced against him under any circumstances.
D) The agreements could be enforced against Byron's father Jeb and Marcus' father.
E) The agreements could be enforced against Lottie and Marcus' father.