—I hope that you can remove the difference between you and Susan and become good friends.  

—      . If only Susan had the same idea.  [ ]

A. My pleasure              

B. It's a pleasure

C. By no means

D. By all means

异步串行通信方式中，传送一帧字符信息由起始位、（）位、（）位和停止位等四部分组成。