Is known for investigative journalism and exposing the corrupt business practices of john d. rockefeller’s standard oil company.

Ida Tarbell is known for investigative journalism and exposing the corrupt business practices of John D. Rockefeller’s Standard Oil Company.

Explanation:

Ida Minerva Tarbell was an American educationalist, woman of letters and journalist. A leading figure in investigative journalism of the progressive era, she wrote numerous articles and biographies for the print media. The book that made her famous, The History of the Standard Oil Company, appeared in 1904 and was still ranked fifth in 1999 in the New York Times' list of the 100 most notable works in 20th century journalism. The article series was important in the process leading up to the split of Standard Oil in 1911.

d

explanation:

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."