It is not known whether bovine spongiform variably encephalopathy (BSE), a disease of cattle invariably deadly to the...

Hi LSAT Max, I had to read the stimulus and answer choices a couple of times before settling with (A). Is this answer choice correct because it talks about animals showing an advanced symptom for BSE, but if the infection is contagious in all levels then it's not just the advanced stage that we should only be concerned with? Thanks in advance!