A defined benefits superannuation plan is: Select one: O a. a fund whose trustee has elected for it to become a public offer fund. O b. a superannuation fund that pays out the sum of the contributions made by the employee and the earnings on those funds. O c. a superannuation plan in which the employer states the benefit that the employee will receive at retirement. O d. a plan offering superannuation products to the public, usually on a commercial basis