A 76-year-old man with a 1-month history of a ...
Anomalous origins of multiple renal arteries to each kidney
you can r/o SMA because as kidneys ascend they get stuck low in the INFERIOR MA (L3 level). So I guess there should be no problem w SMA
I think friability of vascular tissue would indicate in inflammatory process (the one I can think of is strawberry cervix) -- so i think that's why you can rule out choice C.