Predictions twenty years ago that the phonograph record was about to become obsolete have proven to be true.
Answer: A) Predictions twenty years ago that
- A) Predictions twenty years ago that
- B) Predictions twenty years ago,
- C) twenty years ago, predictions that
- D) Predictions, twenty years ago,
Explanation
Option A, no change. "Predictions ... that the record was about to become obsolete" uses "that" to introduce the content of the predictions, and no comma belongs between a noun and such a clause. The other options insert commas that break this link or reorder the phrase awkwardly.