Which of the following statements describes the use of a GROUP BY clause?

A.
A GROUP BY clause returns a single row of information for each group of rows.

B.
A GROUP BY clause automatically sorts the grouped result in ascending order, if
DESCkeyword is not defined.

C.
A GROUP BY clause returns a single row of information for each group of rows, inaddition to all
the rows.

D.
A GROUP BY clause automatically sorts the grouped result in descending order.