Passage: Mosquitoes threaten human health. Chemical control may have undesired consequences. Florida authorities have used genetically modified mosquitoes to control the population; unforeseen consequences of this new approach remain to be seen. Which inference is supported?
Chemicals are better because genetic engineering is dangerous.
Genetically modified mosquitoes are better because they have no side effects.
Both approaches have undesired consequences and can be dangerous.
Chemicals may have undesired consequences, but negative consequences of genetically modified mosquitoes are not yet clear.
Correct answer: (D) Chemicals may have undesired consequences, but negative consequences of genetically modified mosquitoes are not yet clear.
Explanation
The passage states a possible drawback for chemicals and uncertainty about the genetic approach. It does not establish that genetic modification is dangerous or harmless, nor does it rank the approaches. **D** preserves the stated uncertainty.
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