Your database is configured in shared server mode. However， your senior DBA asks you to modifythe value of the PRIVATE_SGA limit in the profile of the users.  What could be the reason for this（）

Ato limit the User Global Area （UGA） memory allocated to a session from the SGA

Bto limit the amount of memory to be used for the dispatcher queue of a session in SGA

Cto limit the amount of memory to be used for the request pool in System Global Area （SGA）

Dto control the amount of memory allocated in SGA for the local variables for each shared server process