The usual response of people who become ill after drinking

Nice question. A similar OG question: https://gmatclub.com/forum/a-natural-re ... 86-20.html

It's between C and E. In C another one can refer to both illness and toxin, which is illogical.

all choices suffer from , verb ing modifier error.

all choices don't have the correct subject for the modification.

ignoring and without anticipating both dont have any proper subject.

ignoring the likelihood that the toxins that caused it could happen again
caused it isn't making any sense , is it the disease or the toxins , no reference therefore out

ignoring the likelihood that the toxins causing it could precipitate a similar physiological response
what is causing what isn't clearly clarified therefore out

ignoring that the toxins that caused the illness might also precipitate another one
what another one illness, toxins no clue therefore out

without anticipating that the toxins causing the illness could happen again
THis gives a meaning as though the toxins could happen again which is not the case therefore out

without anticipating that the same toxins that caused the illness might precipitate another such physiological response
Even though lengthy the meaning is fine therefore our option

Therefore IMO E

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