Settlers refused to help American Indians find better sources of water. Settlers helped American Indians preserve native plants and animals. Settlers spread diseases that killed thousands of American Indians.
German use of submarines to blockade Britain during World War I led to the United States entering the war. The correct option among all the options that are given in the question is the fourth or the last option. before this incident occurred, the United States did not want to enter the war. I hope this helps you.<span />
