Question: Which book by one of the leading "muckrakers" of the progressive era of the late 19th and early 20th centuries, is an exposé about the Standard Oil Company?
Sentence (from "Ida Tarbell"): She was one of the leading "muckrakers" of the progressive era of the late 19th and early 20th centuries and is thought to have pioneered investigative journalism.
Relevant evidence: Yes