71.The Automatic Database Diagnostic Monitor (ADDM) analysis runs every 60 minutes on your database. Your database is facing a series of interrelated problems over a period of two hours. You need to ensure that the ADDM analysis is run over a time span of two hours in future. What would you do?
A.Create two custom ADDM tasks.
B.Modify the AWR snapshot time interval to two hours.
C.Create a new scheduler window for a time period of two hours.
D.Modify the Automatic Workload Repository (AWR) snapshot retention period to two hours.
正确答案是B