Please Answer Questions Follow The Prompts Below

A . Roll-up summary fields can only be created on the master of a master-detail relationship.
B . The roll-up summary field inherits the field C level security of the child object
C . Changes to the value of a roll-up summary field column of roll-up summary filters.
D . Multi-select picklist fields can be used in the field column of roll-up summary filters.

Answer: A,B