What do you infer from this?

View the Exhibit to examine the output produced by the following query at three different
times since the database instance started and has experienced workloads of different
capacities: SQL> SELECT substr(component, 0, 10) COMP, current_size CS,
user_specified_size US FROM v$memory_dynamic_components WHERE current_size!=0;
What do you infer from this?

A.
The database instance is running with manual PGA management.

B.
The database instance is running with manual shared memory management.

C.
The database instance has the MEMORY_TARGET value set to a nonzero value.

D.
All sessions are connected to the database instance in dedicated mode, and no
RMAN or parallel query operations have been performed.