Which of the following actions will enable 64-bit applications on a system with a 32-bit kernel？（）

• A、change the kernel to 64bit， reboot， and then use the following command：chdev -l sys0 -a applications=64_bit
• B、Re-install the OS with 64-bit kernel enabled
• C、Re-install all applications with 64-bit versions
• D、Use smit to enable the 64-bit applications