Your Auditors Require You to Run Monthly Network Performance Reports

Your auditors require you to run monthly network performance reports and to save that data for three year. Using Orion NPM, how should you meet this requirement while optimizing the system around performance and database size?

A) build monthly reports, run them every month, save the output for three years
B) build monthly reports, run them monthly, retain the data in the database for three years
C) build annual reports that break the data out by month, run the reports annually, save the output for three years
D) build monthly reports, run them anytime the auditors request, retain the data in the database for three years