Which two statements are true about WHERE and HAVING clauses? （）
- A A WHERE clause can be used to restrict both rows and groups.
- B A WHERE clause can be used to restrict rows only.
- C A HAVING clause can be used to restrict both rows and groups.
- D A HAVING clause can be used to restrict groups only.
- E A WHERE clause CANNOT be used in a query of the query uses a HAVING clause.
- F A HAVING clause CANNOT be used in subqueries.