______is a variety of language (usually a native language of a country) which serves as a medium of communication among groups of people with diverse linguistic background.

A．They have reached up to 3,500 students to put best 361 colleges this year.
B．The results are based on the feedback of the college students and their teachers.
C．It’s a qualitative survey of the students’ experience both academically, as well as outside the classroom.
D．They have taken the advice of many experts in higher education.

a.A. OttawaB. TorontoC. VancouverD. Montreal