What should the consultant advise?

A development associate using NPSP wants to add the Check/Reference Number on a report but does not see that field in the Report Builder.

What should the consultant advise?
A . Check if the report type includes Opportunities.
B. Check if the report type includes Payments
C. Check a custom field, "Check/Reference Number" on Opportunity
D. Check a custom field, "Check/Reference Number" on Payments

Answer: B