Reports suggested that he Liver Cancer, which originated as Lung Cancer and progressed into his liver. These two cancers are some of the most virulent, and are very difficult to recover from.
The answer would be A (Endocrine-Nervous)
Hope this helps!
I'd say none of the above! If you're planning for yourself you'll want to choose foods you like. It's imperative that in planning meals for anyone you consider their allergies, you don't want to kill them! Your available finances are also important, if you can't afford to go to a fancy restaurant, don't!