Which two statements are true about WHERE and HAVING clauses? （）
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 if the query uses a HAVING clause.
F. A HAVING clause CANNOT be used in subqueries.
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