please answer

Andy recently received a special offer for a cruise in the mail. The offer stated, "get 75% off a Mexican cruise if you accept by Monday, June 15 at 5:00 pm". At the last-minute Andy sent the acceptance on Monday, June 15 at 4:30 pm. Unfortunately, the cruise company did not receive the offer until Wednesday. June 18. Did Andy properly accept the offer? Due to this being a unilateral contract, Andy accepted by submitting the acceptance on time. No, Andy's offer is not accepted unless the offeror sees the offer on the date specified. Yes, the offer was considered accepted when put in the mail. No, Andy had to accept the offer before the deadline. Yes, the cruise company made a firm offer to Andy and now they are obligated to comply with the Irrevocable offer. Which of the following is not an element of a legally binding contract? Remedies Acceptance Offer Consideration