B. Yes,because Waddell has effectively accepted the offer

　　C. No,because Waddell had not made an offer to Yaull

　　D. No,because silence cannot be effective acceptance

　　参考答案D

　　Task-3

　　Is there a contract between Waddell and Zang,and for what reason?

　　A. Yes,because Waddell has not withdrawn the offer so it can be accepted at any time

　　B. No,because acceptance must be communicated and Waddell did not receive the letter

　　C. Yes,because acceptance by post takes place immediately the letter is posted

　　D. No,because acceptance by post was not a reasonable method of communication in this situation

　　参考答案D