Complete Question Explanation
Main Point. The correct answer choice is (C)
In this stimulus, the editorialist discusses the possible hazards associated with chemicals used to treat lumber. The paragraph begins with some background: such chemicals would appear safe where then cannot accumulate. But, asserts the author:
immediate steps should be taken to determine the safety of these chemicals.
The statement above is the editorialist’s conclusion (or main point), based on the danger of exposure to children in wood used in playgrounds, and of leaching into the soil if used as a container.
Answer choice (A): This is the background information presented in the stimulus—it is not the main point of the argument.
Answer choice (B): There is no information provided in the stimulus regarding the relative dangers associated with indoor versus outdoor use of treated lumber, so this answer choice is incorrect.
Answer choice (C): This is the correct answer choice, and it restates the prephrased main point from the discussion above. The main point of the passage is that immediate steps should be taken to make safety determinations.
Answer choice (D): While this is probably not bad advice in general, this is certainly not the main point of the passage, which is that steps should be taken to determine the safety of the wood treating chemicals.
Answer choice (E): The stimulus provides no information about past beliefs regarding the dangers of treated lumber.