Who publishes the report?

Who provides the data?

What kind of information is available?

What can we learn by studying the data?

What are some of the shortcomings of the report?

Which source do you think provides the most accurate picture of crime in the United States?

these are the questions i must answer but im a little confused, im not asking someone to write a paper for me but can anyone help explain them to me for:

1) The UCR and NIBRS

2) The National Crime Victimization Survey (NCVS)

3) Self-Report studies

i have to answer the questions for those three reports/agencies(?) and ive looked up alot of it but am still a little lost, please help!