What could be the reason for the elimination of the other rows in the output?

View the Exhibit to examine the output of the DBA_OUTSTANDING_ALERTS view. After 30
minutes, you executed the following command: SQL> SELECT reason,metric_value FROM
dba_outstanding_alerts; REASON METRIC_VALUE ——————————
———————- Tablespace [TEST] is [28 perce 28.125 nt] full What could be the reason
for the elimination of the other rows in the output?

A.
An Automatic Workload Repository snapshot has been taken recently.

B.
The non-threshold-based alerts are transferred to DBA_ALERT_HISTORY.

C.
The threshold alerts conditions are cleared and the alerts are transferred to
BA_ALERT_HISTORY.

D.
The threshold alerts related to database metrics are permanently stored in
DBA_ALERT_HISTORY but not the threshold alerts related to instance metrics.