Which of the Following Is a Valid Statement?​

Multiple Choice

Which of the following is a valid statement?​

A) ​The ORDER BY clause cannot be used in a SELECT statement containing a GROUP BY clause.
B) ​Data returned from a GROUP BY clause will automatically be sorted in descending order.
C) ​Column aliases cannot be used in a GROUP BY clause.
D) ​Columns referenced in the GROUP BY clause must also be contained in the SELECT clause.