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?

Correct answer marked below

Tuff motor oil provides above-average protection for engines that happen to overheat.

Correct

Tuff motor oil is periodically supplied free of charge to automobile manufacturers to use in factory-new cars.

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.

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What this question tests

Whether you can identify the option that most bolsters an argument's conclusion.

Choosing an option that is consistent with the argument but adds no new support, or that shifts the topic.