Examine the structure of the EMPLOYEES table: Column name Data type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key LAST_NAME VARCNAR2(30) FIRST_NAME VARCNAR2(30) JOB_ID NUMBER SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER You need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform this task?（）

• A、CREATE INDEX NAME _IDX (first_name, last_name);
• B、CREATE INDEX NAME _IDX (first_name, AND last_name)
• C、CREATE INDEX NAME_IDX ON (First_name, last_name);
• D、CREATE INDEX NAME_IDX ON employees (First_name, AND last_name);
• E、CREATE INDEX NAME_IDX ON employees (First_name, last_name);
• F、CREATE INDEX NAME_IDX FOR employees (First_name, last_name);