Which option would you consider first to decrease the wait event values on a longterm basis?

You find that in the Top 5 Timed Events section of the Automatic Workload Repository (AWR)
report, the wait event buffer busy waits shows significantly high values.The database uses only
non-ASSM locally managed tablespaces.On further investigation, you find that the contention is on
data blocks.Which option would you consider first to decrease the wait event values on a longterm basis?

A.
decreasing PCTUSED

B.
decreasing PCTFREE

C.
increasing the number of DBWn processes

D.
using automatic segment space management (ASSM)

E.
increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation