The following text is from a technology article.
3D printing has moved beyond prototyping into manufacturing applications. Aerospace companies print titanium components previously impossible to machine conventionally. Medical researchers create patient-specific implants tailored to individual anatomies. While per-unit costs remain higher than mass production for most products, the technology excels where customization or complex geometries are required.
Which choice best describes the function of the last sentence?
It introduces disadvantages that the passage will further explore.
It clarifies the specific contexts where the technology offers advantages.
It contradicts the claims made about aerospace and medical applications.
It provides cost comparisons with specific dollar amounts.
Correct Answer: B
Choice B is the best answer. The last sentence clarifies where 3D printing excels: customization and complex geometries.
- Evidence: The text notes a downside: "per-unit costs remain higher." It clarifies the advantage: "excels where customization or complex geometries are required."
- Reasoning: The sentence refines the scope of the technology's usefulness.
- Conclusion: The function is to clarify specific contexts.
💡 Strategy: Look for the contrast "While... the technology excels where..." -> clarifies the specific use case.
Choice A is incorrect because no further exploration follows. Choice C is incorrect because it supports, not contradicts. Choice D is incorrect because specific amounts aren't given.