Alexei Verbally Orders a Birthday Cake from Ng's Bakery

Multiple Choice

Alexei verbally orders a birthday cake from Ng's bakery.Alexei orders it for 'the 3rd of the month' but Alexei meant the following month and Ng thought Alexei meant this month.Which of the following is the best answer?

A) The contract is void for mutual mistake.
B) There is common mistake and the contract is voidable.
C) There is unilateral mistake on the part of each party and the contract is void.
D) The contract is enforceable by either party.