Ann was offered a job that would pay $$20000,$ that would provide for $18$ days of vacation after one year of employment, and that would begin one week after her graduation. She wrote back that she would accept the job, but that she would not begin until three weeks after graduation and needed at least $21$ days of vacation after the first year of work. On these facts, which of the following is true? aThere is no contract because an acceptance must be unconditional, and Ann's counter$-$offer has not been accepted. bThere is a contract as soon as Ann drops her letter in the mailbox. cIf Ann had not responded, there would have been a contract because silence is the standard form of acceptance. dAnn is still free to reconsider and take the original offer even after the prospective employer receives her letter. eSince Ann accepted the offer, there is a contract.