For a Class Project, You Want to Survey Students at Your

Multiple Choice

For a class project, you want to survey students at your school for their opinions about the importance of studying. You go to the campus library and survey two hundred students as they are leaving the library.
What type of sampling was used in this situation?

A) This is a simple random sample.
B) This is a convenience sample.
C) This is a voluntary response sample.
D) This is a census.