Last week, Chris offered to sell her printer to a classmate for $200. Her offer included these exact words: "This offer to be open until noon, February 20." She now has second thoughts and thinks she should give or sell it to her brother, who has gone back to school. She wants to end the offer. Which of the following would n_ot end the offer? 0 revocation of the offer by Chris before acceptance 0 counter-offer by an offeree O the sale of the printer to her brother before acceptance 0 Chris's death before acceptance 0 expiration of the offer at noon on February 20 if there has been no acceptance