In Martin Gill's Research on the Effectiveness of CCTV Projects

Multiple Choice

In Martin Gill's research on the effectiveness of CCTV projects in the UK, which of the following techniques did he use?

A) the research measured fear of crime by citizens before and after the cameras went up
B) the research measured police data before the cameras went up
C) comparison was made only in the area where cameras were in use
D) the research measured if the offenders changed the type of crimes they were committing