Mealey's (April 2, 2021, 2:54 PM EDT) -- GALVESTON, Texas — Marathon Oil Co. on March 31 filed an answer in Texas federal court denying all liability for a man’s cancer allegedly caused by his exposure to benzene while he worked as a mechanic at a car dealership. Marathon also argues that the man fails to state a claim or a cause of action for which relief may be granted....