Transformation of some types of human cells has been achieved through insertion of cloned genes coding for

A)Oncogenic H-Ras alone.
B)SV40 early region and hTERT together.
C)SV40 early region and oncogenic H-Ras together.
D)hTERT and oncogenic H-Ras together.
E)Oncogenic H-Ras,SV40 early region,and hTERT together.