GMAT Critical Reasoning (CR) | Advertisement: When your car’s engine is running at its normal

Goal is to strengthen :
So, if you want your car’s engine to have maximum protection, you should use Tuff.

A - says tuff offers above avg protection in overheat situation

Passage already mentions it is better than other oils in cold conditions
So in both extremes tuff is provides max protection
In normal condition, every oil is almost same

This is correct choice!

B, C, E-out of scope

D - weakens the argument

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