Hi I want to know what the advantage or disadvantage of the B is ? My wife 42j has had since 3j 100% G, unlimited because of lung cancer getting lung fullumen 91% still had, now the cancer is back since november, had chemo and is now to cure in the clinic was said work is nothing more lung fullumen is now at 75% after 20m is the vertig as after a Maraton work she would like to try but still,in the clinic was said she should submit a deterioration request since s is made in the clinic on A and B. I see at B afterparts for her driving and what do you think about it ? Greetings