Which performance issue does NOT appear in the ADDM and needs alternative tools for investigation?

As part of a proactive tuning activity, you have the Automatic Workload Repository (AWR) and
ADDM enabled for your database with the default setting of snapshot retention as 8 days and
snapshot interval as 60 minutes.Which performance issue does NOT appear in the ADDM and
needs alternative tools for investigation?

A.
suboptimal parameter settings

B.
application-level block contention

C.
performance issues related to the Resource Manager

D.
short-lived or intermittent performance issues lasting for less than 5 minutes