单项选择题

A. The query starts under the CLERKS group and the user, SCOTT, switches back to the MANAGERS group after the query completes.
B. The query starts under the MANAGERS group but terminates with an error when the execution time exceeds 10 minutes.
C. The query starts under the MANAGERS group and switches automatically to the CLERKS group when the execution time exceeds 10 minutes. The query does not switch back to the MANAGERS group after the query completes.
D. The query starts under the MANAGERS group, the user SCOTT switches automatically to the CLERKS group when the execution time exceeds 10 minutes, and then switches back to the MANAGERS group after the query completes.