A Master-Detail Relationship is a tight coupling between two objects that provides several unique functionalities:
Master Object Types:The master can be either a standard object (like Account) or a custom object (Option B).
Roll-up Summaries:This relationship type is the only one that natively supports Roll-up Summary fields, allowing the master record to calculate counts, sums, or averages of fields on the detail records (Option C).
Ownership and Security: The detail record inherits its owner and its security/sharing settings from the master record. Consequently, there is no "Owner" field on a detail record; it is always owned by the owner of the master (Option D).
Option A is incorrect because detail records cannot have independent permissions. Option E is incorrect because an object can only have a maximum of two master-detail relationships. This relationship is ideal for parent-child scenarios where the child's existence is entirely dependent on the parent.
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