Advertisement: When your car's engine is running at its normal operating temperature, any major brand of motor oil will protect it about as well as Tuff does. When the engine is cold, it is a different story: Tuff motor oil flows better at lower temperatures than its major competitors do. So, if you want your car's engine to have maximum protection, you should use Tuff. which of the following, if true, most strengthens the argument in the advertisement? ['Tuff motor oil provides above-average protection for engines that happen to overheat.', "Tuff motor oil's share of the engine oil market peaked three years ago.", 'Tuff motor oil, like any motor oil, is thicker and flows less freely at cold temperatures than at hot temperatures.', 'Tuff motor oil is manufactured at only one refinery and shipped from there to all markets.']