Question

When Thomas Edison patented the phonograph in 1877, he envisioned it primarily as an office tool designed to record dictation, preserve oral histories, and assist the blind. To Edison, the machine’s value lay in its utility as a reliable stenographer. He initially resisted the commercial exploitation of the device for musical entertainment, viewing such pursuits as frivolous distractions from its serious, practical capabilities. Yet, as the technology found its way into public spaces, it was quickly co-opted by entrepreneurs who installed 'nickel-in-the-slot' phonographs in phonograph parlors, allowing patrons to listen to popular music through listening tubes. The overwhelming public demand for recorded music forced a pivot in the industry; manufacturers began mass-producing musical cylinders, and the phonograph evolved from a sterile administrative aid into a transformative cultural medium. This transition was not driven by technological breakthrough or managerial foresight, but by the spontaneous alignment of public desire and entrepreneurial opportunism. The physical mechanism of the phonograph remained largely unchanged during these early years, yet its presence in American life was utterly rewritten.

Which of the following best expresses the central theme of the passage?