Simon Cinema Wants to Know What the Audience Thought of Tonight's

Multiple Choice

Simon Cinema wants to know what the audience thought of tonight's advanced screening of a heralded psychological thriller called "I Can't Sleep." He and his research assistants stand outside the theatre exit and ask every fifth person leaving the theatre to answer several questions about their impression of the movie.Simon is using:

A) systematic sampling.
B) stratified random sampling.
C) convenience sampling.
D) purposive sampling.