To load the base operating system on a machine using NIM， what are the minimum NIM resources   that must be defined for the installation to succeed（）

A.A mksysb resource， a SPOT resource， and an lpp_source resource

B.A SPOT resource， an lpp_source resource， and a machine definition

C.An lpp_source resource， a mksysb resource， and a machine definition

D.A SPOT resource， an lpp_source resource， a bosinst_data resource， and a machine definition