Junction Objects for Many-to-Many Relationships

A.

The statement is true. In Salesforce, a many-to-many relationship between two objects can be created using a junction object.

A junction object is a custom object that serves as a bridge between two other objects. For example, suppose you have two objects: "Opportunity" and "Contact." You want to establish a many-to-many relationship between them so that multiple Opportunities can be associated with multiple Contacts, and vice versa.

To achieve this, you would create a new custom object, such as "Opportunity Contact," that would have Master-Detail relationships with both Opportunity and Contact objects. The Master-Detail relationship is used because it ensures that the junction object's record is deleted automatically when either the Opportunity or Contact record is deleted.

Once the junction object is created, you can create lookup fields on both Opportunity and Contact objects to associate them with the junction object. This allows you to create multiple records on the junction object, each of which represents a unique combination of Opportunity and Contact records.

In summary, a junction object is necessary to create a many-to-many relationship between two objects in Salesforce. The junction object must have Master-Detail relationships with both objects and can be used to create multiple records, each representing a unique combination of the related objects.