Which is the closest synonym for the word prominent, as it is used in the article?

The closest synonym for the word “prominent,” as it is commonly used, is C. famous.

Explanation: “Prominent” typically refers to something or someone that stands out and is well-known or easily noticeable. “Famous” captures this meaning by indicating renown or public recognition, whereas “ordinary” and “selfish” have different connotations, and “modern” relates to time rather than recognition.