In your running instance, some of the initialization parameters are set as shown below: SGA_MAX_SIZE = 14GB <br /> DB_CACHE_SIZE = 1GB <br /> SHARED_POOL_SIZE = 3GB <br /> STATISTICS_LEVEL = BASIC <br /> PGA_AGGREGATE_TARGET = 0 <br /> You plan to enable Automatic Shared Memory Management but you are not able to set SGA_TARGET to a nonzero value. What could be the reason?()
A、The STATISTICS_LEVEL initialization parameter is set to BASIC
B、The PGA_AGGREGATE_TARGET initialization parameter is set to zero.
C、The SGA_MAX_SIZE initialization parameter is set to less than 20 GB
D、The DB_CACHE_SIZE initialization parameter is set to less than 5 GB
E、The SHARED_POOL_SIZE initialization parameter is set to a nonzero value.