The correct answer is D, that to encourage people to take action against widespread corruption
The "Muckrakers" were crusading journalists, authors and photographers who published their work in order to raise awareness on social issues and injustice. Other muckrakers highlighted the deficiencies in the political system. Their newspapers, articles and photographs led to the formation of influence groups sparking a series of reforms during the Progressive Era (1890 - 1920). Raising awareness of social injustice, corruption and inequality and the abuse of political power was their main goal in order to bring about the reform.
The Selective Service Act or Selective Draft Act authorized the federal government to raise a national army for the American entry into World War I through the compulsory<span> enlistment of people</span>
<span>c. Newspapers and magazines became more affordable.</span>
The best and most correct answers among the choices provided by the first question are "Gaining political power and investing in trades".
On the other hand, the best and most correct answer among the choices provided by the second question is the third choice"<span>Mary tudors persecution of heretics"
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I hope my answer has come to your help. God bless and have a nice day ahead!