We need to identify which factors could decrease the significance of CCTV in decreasing crime.
1 – Correct
Improved street lighting could have been a reason for the decrease in crimes.
2 – Correct
An anti-burglary initiative could have caused the fall in crime levels.
3 – Correct
A decrease in number of cars parked in the target areas could have reduced the vehicle crimes. So this could have led to a fall in overall crime levels.
Since all 3 statements are correct, F is the answer.