Answer :
United States have a policy of neutrality before 1917 because most Americans believed the war was a European conflict and didn't want to get involved.
The correct answer is D. Most Americans believed the war was a European conflict and didn't want to get involved.
Explanation
During World War I, the United States headed by Woodrow Wilson as president remained neutral in the face of the European war despite the constant pressure of some American political sectors, this presidential initiative was due to the raw childhood that the president lived during the American civil war, in addition, did not see great opportunities for their nation to be involved in the war. This presidential position is ratified by the population given that the president obtains the re-election taking as the motto of his campaign the neutrality and the peace that had been up to this moment because the majority of people did not see fit to enter a disputed war between nations of another source such as the First World War. So, the correct answer is D. Most Americans believed the war was a European conflict and didn't want to get involved.