（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.

答案：（B）