The following text is from a biology article.
CRISPR technology allows precise editing of genetic sequences, raising profound ethical questions. Scientists can now target specific genes responsible for hereditary diseases. The same technology, however, could theoretically be used for cosmetic genetic modifications or enhancement. The scientific community is actively debating where to draw lines between therapeutic and non-therapeutic applications.
Which choice best describes the function of the third sentence?
It introduces a potential misuse that complicates the ethical picture.
It provides technical details about how CRISPR functions.
It questions whether hereditary diseases can really be targeted.
It summarizes the benefits already discussed in the passage.
Correct Answer: A
Choice A is the best answer. The third sentence introduces "cosmetic modifications or enhancement"—potential misuses that complicate the ethics beyond just disease treatment.
- Evidence: The sentence states: "The same technology, however, could theoretically be used for cosmetic genetic modifications."
- Reasoning: This introduces a darker/more complex side to the technology previously described as beneficial.
- Conclusion: The function is to introduce a complicating potential misuse.
đŸ’¡ Strategy: Look for the pivot word "however" and the shift from "curing disease" to "cosmetic enhancement."
Choice B is incorrect because technical details aren't provided here. Choice C is incorrect because disease targeting isn't questioned. Choice D is incorrect because it adds concerns, not summarizes benefits.