Click the Exhibit（s） button to view the EMPLOYEES table. The EMPLOYEE table contains thousands of rows. The EMP_CODE column is the primary key column. At the end of every month， you are required to perform search queries based on the BASIC_SAL+COMM column values. Which type of index will you create？（）
- A B-tree Index
- B Bitmap Index
- C Function-based Index
- D Partitioned Index