An administrator has received an update CD with the latest technology level for AIX 5.3. The current  operating system level of the sever is at base AIX5.3.  What action needs to be taken to apply the new  technology level to the server（）

• A、Run smit update_all
• B、Run smit install_all
• C、Boot from the installation media
• D、Run the update_all command from the mounted CD