He arrested Mitchell Palmer for civil liberty violations.
He served as the attorney for those arrested.
He was director of the antiradicalism division in the Department of Justice.
He led the deportation process of the accused immigrants.
During 1919, J. Edgar Hoover became the head of the Justice Department's Bureau of Investigation. ... Hoover's first task as the head of the Bureau was to lead the Palmer Raids with the intent of arrest and deport those people who were considered dangerous like communists, anarchists or other radicals.
J. Edgar Hoover was the Director of the antiradicalism division of the Department of Justice. Thus, the correct answer is C). He was the one to get all of the warrants served in the Palmer Raids.