Simon, aged 10, is invited to a classmate's birthday party at an exclusive ski resort on March 15th. The day will include 4 hours of snowboarding, lunch and birthday cake. Simon's mother checks a box on the invitation that says "YES, we will attend" and returns it to the classmate's address. Unfortunately, they later don't attend the party when Simon comes down with the flu. On March 17th, Simon's mother receives an invoice in the mail from Simon's classmate for $35 that says, "Party No-Show Fee." Can Simon's classmate collect the fee?

a. No, because Simon was ill and that is a reasonable excuse to not attend.
b. Yes, because Simon's mother checked the "YES" box on the invitation, creating a contract obligation.
c. No, because there was no intent to form a contract by Simon's mother.
d. Yes, because the classmate has a case for quasi-contract.