The U.S. tried to stay out of WWII by following the practice of: imperialism nationalism militarism isolationism

## Step 1<br />The question is asking about the policy that the United States followed during World War I. The options provided are imperialism, nationalism, militarism, and isolationism.<br /><br />## Step 2<br />The United States initially adopted a policy of isolationism during World War I. This policy meant that the U.S. did not want to get involved in the war and tried to stay out of it.<br /><br />## Step 3<br />The U.S. was not interested in expanding its influence or territory (imperialism), promoting national pride (nationalism), or increasing its military strength (militarism). Instead, it wanted to focus on its own affairs and avoid getting entangled in the conflicts of other countries.<br /><br />## Step 4<br />This policy of isolationism was consistent with the U.S.'s general foreign policy during this time period, which was to avoid involvement in European conflicts.