An administrator has received an update CD with the latest technology level for AIX 5.3. The current operating system level of the server is at base AIX 5.3. 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