Answer:
The answer is: <em>D. Investigative journalists whose work sought to bring about social reform and relief for the lower classes.</em>
Explanation:
According to the Cambridge Dictionary, <em>muckraker</em> is a person, especially one in a news organization, who tries to find out unpleasant information about people or organizations in order to make it public.
Upton Sinclair was an American novelist, essayist, playwright, and short-story writer, who wrote "The Jungle" a 1906 novel . It was written to portray the harsh conditions and exploited lives of immigrants in the United States in Chicago and similar industrialized cities.
D. /mir/
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Sorry, my answer needs to be 20 characters. But the answer is d :)
The answer is D. The Magna Carta advocatd for the rights of commoners. It did eventually lead to the abolition of the monarchy in 1649, however.