The topic sentence, "The phonautograph eventually evolved into the commercially viable phonograph," clearly states that the paragraph will discuss the evolution of sound recording technology. To suppo

The topic sentence, "The phonautograph eventually evolved into the commercially viable phonograph," clearly states that the paragraph will discuss the evolution of sound recording technology. To support this topic, the paragraph would use keywords that describe changes, progression, and new capabilities over time.

Let's analyze the options:

• A) original, then, mass-produced, reproduced:

  • "original" refers to the initial state or recording, which is contrasted with later, reproducible versions.
  • "then" indicates a sequence of events or developments over time.
  • "mass-produced" highlights a significant advancement in the technology's commercial viability and production methods.
  • "reproduced" describes the ability to create copies, a key evolutionary step from earlier, non-reproducible methods. These words collectively demonstrate the progression and changes in the technology.

• B) discovered, thereby, Emile Berliner, rather: These words describe actions, consequences, a person, and a comparison, but they do not directly convey the evolution of the technology as a process.

• C) evolved, tinfoil, amplifier, stylus:

  • "evolved" is the core concept of the topic itself, not a supporting keyword within the paragraph that describes the evolution.
  • "tinfoil," "amplifier," and "stylus" are specific components or materials used in the technology at different stages. While they are part of the technological description, they don't inherently describe the process of evolution as effectively as the words in option A.

• D) 1878, 1887, had been done until then, as was the case: These are dates and phrases indicating time or comparison, which provide context for the evolution but are not keywords that describe the nature of the evolution itself.

Option A provides words that illustrate the stages, improvements, and new capabilities that define the evolution of the technology.

The correct answer is A.
A) original, then, mass-produced, reproduced