Answer:
Muckraker
Explanation:
Named by Theodore Roosevelt, these journalists/writers who tried to expose corruption and problems in society during the Progressive Era were called muckrakers.
A popular "muckraker" was Ida B. Tarbell who exposed many scandals and wrongdoings of Rockefeller's Standard Oil Company.
Hope this helps!! :)
The four main causes were: militarism, alliances, imperialism and nationalism - or as an acronym, M-A-I-N (this made it much easier for me to remember the causes)
Expansionist justified the idea of Manifest Destiny because they said they were spreading democracy. They wanted everybody to be live like they do and to be democratic and what better way to do that than by spreading the word to the people living on the land that they already conquered.
It is due to i believe the rise of cotton
