Which two statements are true regarding the SGA_TARGET initialization parameter（）

• A、It can be increased up to the value of the SGA_MAX_SIZE parameter.
• B、Increasing the value of the SGA_TARGET parameter distributes the increased memory among all the Autotuned components.
• C、Reducing the value of the SGA_TARGET parameter deallocates memory from both autotuned and Manually sized components.
• D、Increasing the value of SGA_TARGET up to the value of SGA_MAX_SIZE disables the automatic shared Memory management feature.