Think about the geographic, ethnic, racial, and religious diversity of the students as a means of ______..

单项选择题A．Because we fail to listen carefully when they talk.B．Because people tend to be annoyed when we check what they say.C．Because people usually state one thing but means another.D．Because we tend to doubt what our friends say.

单项选择题A．They attend a housesitter’s party.B．They check a housesitt’s references.C．They interview a housesitter’s friends.D．They look at a housesitter’s transcripts.