Iris. What do you think Was doris allowed to revoke her offer like that? No $-$ this was an offer to sell goods, which can't be revoked during the guaranteed time period.

Response $2$ of $3$: No $-$ this was an offer for a unilateral contract, which can't be revoked after the offeree begins performance. No $-$ this was an offer for a unilateral contract, which can't be revoked after the offeree begins performance.

Response $3$ of $3$: Yes $-$ this was a firm offer to sell goods which can be revoked at any time prior to acceptance. Yes $-$ this was a firm offer to sell goods which can be revoked at any time prior to acceptance.