Which two things does the consultant need to set up to ensure that the membership rollups in NPSP will work properly?

A nonprofit organization has engaged a consultant to implement NPSP and has a large membership program it wants to manage in Salesforce .

Which two things does the consultant need to set up to ensure that the membership rollups in NPSP will work properly?
A . Ensure there is a custom field created for Membership Amount and selected for membership rollups
B . Check that the membership record type is selected for membership rollups.
C . Ensure there is an Opportunity record type set up for memberships
D . Check that the grace period is set up for memberships.

Answer: B,D