WHAT VALUE IS RETURNED AFTER EXECUTING THE FOLLOWING STATEMENT

5. What value is returned after executing the following statement?SELECT AVG(NVL(SALARY,100)) FROM EMPLOYEES;Assume there are ten employee records and each contains a SALARY value of 100, except for one employee, who has a null value in the SALARY field. (Choose the best answer.) A. NULL B. 90 C. 100 D. None of the above