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 that the offer expires at 5:00 p.m.Toronto time.Sanjay, who lives in Vancouver, replies and accepts Joe's offer at 4:00 p.m.Vancouver time.Joe receives 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's offer had expired.
B) A binding contract had been formed, once Joe opened Sanjay's email acceptance the next day.
C) Once Sanjay sent the email, a binding contract had been formed regardless of what time Joe received the email.
D) Joe and Sanjay had a binding contract, since Sanjay had accepted by 4:00 p.m.Vancouver time.