Evaluate the following function code： CREATE FUNCTION get_dept_avg（dept_id NUMBER） RETURN NUMBER RESULT_CACHE RELIES_ON （EMPLOYEES） IS avgsal NUMBER（6）； BEGIN SELECT AVG（SALARY）INTO avgsal FROM EMPLOYEES WHERE DEPARTMENT_ID = dept_id； RETURN avgsal； END get_dept_avg； Which statement is true regarding the above function？（）
- A The cached result becomes invalid when any structural change is done to the EMPLOYEES table.
- B If the function execution results in an unhandled exception，the exception result is also stored in the cache.
- C Each time the function is invoked in a different session，the current result in the result cache gets overwritten.
- D If the function is invoked with a different parameter value，the existing result in the result cache gets overwritten by the latest value.