Using material from the item and elsewhere, assess the strengths and weaknesses of using questionnaires to investigate violent crime

Using material from the item and elsewhere, assess the strengths and weaknesses of using questionnaires to investigate violent crime (33 marks)

This essay is about using questionnaires to research violent crimes.

I got a B in this essay, but my techer said it was way too long for a 15 marks essay ((the longest int he class - LOL xD))