To load a base operating system on a machine using NIM， what are the minimum NIM resources that must be defined for the installation to succeed？（）
- AA mksysb resource， a SPOT resource， and an lpp_source resource
- BA SPOT resource， an lpp_source resource， and a machine definition
- CAn lpp_source resource， a mksysb resource， and a machine definition
- DA SPOT resource， an lpp_source resource， a machine definition， and a bootable CD