Which two actions should a developer take to accomplish the following Task? 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.
A. Create a master-detail relationship between the rating and employee object B. Create a trigger on the rating object that updates a field on the employee object C. Create a roll-up summary field on the employee and use avg to calculate the average rating score D. Create a lookup relationship between the rating and employee object