Companycom needs to run a 32 bit kernel under AIX 5.3. What steps need to be done to accomplish this with the least disruption since the system is already installed with a 64 bit kernel?（）

• A、Reload the operating system and select 32 bit kernel on initial install.
• B、Repoint the symbolic link of /unix to unix_mp. Perform a bosboot and reboot the partition.
• C、Use the SMIT menu to select 32 bit versus the 64 bit kernel. Select 32 bits and reboot the  partition.
• D、Go into SMIT and select 32 bit kernel. Run the /usr/sbin/bootinfo -K command， and ensure that the kernel has been changed.