Joe Sends Sanjay an Offer Via Email from His Toronto

Joe sends Sanjay an offer via email from his Toronto office. The offer contains a provision indicating the offer expires at 5:00 p.m. Toronto time. Sanjay, who lives in Vancouver, replies accepting Joe's offer at 4:00 p.m. Vancouver time. Joe received Sanjay's email acceptance at 9:00 a.m. the next day. Which of the following statements is true? (Note the three hour time difference between Toronto and Vancouver)

A) Joe and Sanjay had a binding contract, since Sanjay had accepted by 4:00 p.m. Vancouver time.
B) Once Sanjay had sent his email, a binding contract had been formed, regardless of what time Joe had received the email.
C) Joe's offer had expired.
D) The contract became binding once Joe had made the offer.
E) A binding contract was formed once Joe opened Sanjay's email acceptance the next day.