You create an Oracle 10g database and configure the SPFILE as follows： SGA_TARGET=2G DB_CACHE_SIZE=512M LOG_BUFFER=50M DB_KEEP_CACHE_SIZE=128M You modify the SGA_TARGET initialization parameter using the following statement： SQL>ALTER SYSTEM SET SGA_TARGET = 1G SCOPE = BOTH； Which entity does this statement affect？（）

A. only the auto-tuned memory components
B. only the memory components that are not auto-tuned
C. both the auto-tuned memory components and the non-auto-tuned memory components
D. neither the auto-tuned memory components nor the non-auto-tuned memory component