Which of the following is (are) true? L. 6. It worker must be fully insured, which means that she has earned a certain nimber of quarters of coverage under the Social security system. 11. Eaming $15,000, regardless of when it was earned during the yes, will credit the worker with 4 quarters of coverage for that year. Select one a. I only. b. II orty C. Both I and II d. Neither I nor 11