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 correct answer to this open question is the following.
You forgot to include the options for this question. However, we can say the following.
The phrase from the Preamble to the U.S. Constitution rejects that idea is "Establish Justice, ensure domestic Tranquillity, provide for the common defense."
When the founding fathers and framers of the United States Constitution met during the Constitutional Convention in the city of Philadelphia, Pennsylvania in the summer of 1787, they debated so much to agree on the new kind of government for the new nation. In the Preamble, the framers clearly stated that the government had to defend the country against any foreign aggression.
That is why, in the Executive branch, the United States President in the Commander-in-chief of the Armed Forces: Navy, Army, the Air Force, and the Coast Guard.