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Due to oxidation, the iron components that are utilized in structures formed with reinforced concrete can potentially lose their strength over time, especially in coastal areas with high humidity levels. This phenomenon can be prevented by coating the iron components with a robust secondary substance, such as a polymer with anti-oxidant properties. Therefore, it is certain that buildings constructed in areas with high humidity using reinforced concrete that contains uncoated iron components will suffer structural damage in the form of corrosion due to oxidation.
Which of the following, if true, undermines the author's conclusion?
This answer choice neither weakens nor strengthens the conclusion because it deals with the cost of the coating materials (fairly expensive) while this issue is not discussed in the argument.
This answer choice neither weakens nor strengthens the conclusion. Since expenses are not discussed in the argument, budgets and costs of the coating material are irrelevant. The issue is whether or not the coating is vital.
This answer choice strengthens the conclusion while you're required to weaken it. By highlighting the harsh conditions that buildings close to the sea experience, we are led to believe that those that do not have coated iron components in their concrete are indeed likely to be damaged.
This answer choice strengthens the conclusion while you're required to weaken it. By describing a situation where a coating is vital in protecting the iron components, this statement clearly supports the importance of the coating.
This answer choice tells us that only when a mistake is made are the internal iron parts exposed to the air. Therefore, the conclusion that buildings with uncoated parts will suffer structural damage is undermined since only those built incorrectly will have cracks that are necessary for the iron parts to become damaged.