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Difficulty: MediumSelecting Concluding Sentences and Transitions

In the late nineteenth century, sound was first captured on delicate wax cylinders and shellac discs. Over time, these historical recordings have degraded, making them too fragile to play with a traditional needle. To preserve these audio treasures, scientists developed the IRENE system, which uses high-resolution digital imaging to scan the physical grooves of a record. By converting these visual scans into digital sound files, researchers can reconstruct audio from damaged media without physical contact.

Which choice provides the most logical and effective concluding sentence for the paragraph?

  1. A
    Consequently, scientists prefer shellac discs because they are more durable than wax cylinders.
  2. This non-invasive technology ensures that the voices and music of the past can be heard by future generations.Answer
  3. C
    Instead, researchers scan the grooves, they reconstruct the audio files digitally.
  4. D
    Ultimately, the system, that scans the grooves, prevents further damage to the records.

Answer

This non-invasive technology ensures that the voices and music of the past can be heard by future generations.
The correct option effectively wraps up the paragraph by highlighting the ultimate goal and benefit of the IRENE system: preserving historical audio for the future. It remains on-topic, maintains a formal tone, and does not contain grammatical or transitional errors.

Step-by-Step Solution

1
Analyze the main focus of the paragraph.
The paragraph discusses the degradation of early sound recordings (wax cylinders and shellac discs) and how the new, non-contact IRENE digital scanning system allows researchers to reconstruct and preserve this audio.
An effective concluding sentence must align with the main thesis and bring closure to the topic discussed.
2
Evaluate the choices for relevance and grammatical correctness.
The correct option successfully summarizes the overall purpose and significance of the technology—preserving historical sound for future generations—without introducing new, unsupported details or grammatical errors.
We must eliminate options that introduce off-topic details, use incorrect transitions, or contain grammatical errors.

Key Concept

Selecting Concluding Sentences and Transitions
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Topics

Selecting Concluding Sentences and Transitions

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