(February 16, 2016, 2:45 PM EST) -- COLUMBUS, Ohio — E.I. du Pont de Nemours and Co. on Feb. 12 filed an answer and affirmative defenses in Ohio federal court related to one of the Ohio residents that is a plaintiff in the litigation for personal injuries related to exposure to perfluorooctanoic acid (known as C8). The company denies all allegations in the complaint and contends that the plaintiff failed to plead facts sufficient to state a valid claim for “abnormally dangerous or ultrahazardous activity” (In re E.I. du Pont de Nemours and Co. C-8 Personal Injury Litigation, MDL No. 2433, No. 13-2433, S.D. Ohio)....