問題文
A training provider needs to record which instructors are qualified to teach which courses. One instructor teaches several courses, and one course is taught by several instructors. The qualification itself carries a certification date. What is the appropriate data model?
選択肢
- Two lookup relationships from Instructor to Course and from Course to Instructor.
- A master-detail relationship from Course to Instructor with reparenting allowed.
- A multi-select picklist on Course that lists the instructors, with a text field for the certification date of each instructor in the same record.
- A junction object named Qualification with master-detail relationships to both Instructor and Course, holding the certification date.