A company wants to create an employee rating program that allows employees to rate each other. An employee's average rating must be displayed on the employee record. Employees must be able to create rating records, but are not allowed to create employee records.
Which two actions should a developer take to accomplish this task? (Choose two.)

• A.Create a lookup relationship between the Rating and Employee object.
• B.Create a roll-up summary field on the Employee and use AVG to calculate the average rating score.
• C.Create a master-detail relationship between the Rating and Employee objects.
• D.Create a trigger on the Rating object that updates a fields on the Employee object.

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