You have recently collected statistics on certain objects of a schema in your database. But you
observe suboptimal execution plans for the queries on these objects after two days of statistics
collection. The optimizer statistics retention period is set to its default value.
Which action would help to use the previous set of statistics on the objects?
A.
Restore statistics from statistics history.
B.
Reduce the optimizer statistics retention period by 2 days.
C.
Set the OPTIMIZER_PENDING_STATISTICS parameter to TRUE.
D.
Reduce the Automatic Workload Repository (AWR) retention period by 2 days.