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

A.Use smit load64bit to enable the 64-bit applications.

B.Re-install all applications with 64-bit versions.

C.Re-install the OS with 64-bit kernel enabled.

D.Change the kernel to 64bit， reboot， and then use the following command： chdev -l sys0 -a applications=64_bit