The German Use of submarine warfare caused tension to increase between the United States and Germany. Their submarines were called U-Boats.
Settlers thought they were devils because of their culture.
I think that the best way to complete this analogy is option a.<span>non-fiction : fiction. There is nothing in the original pair to make an analogy to the other ones, and in both pairs you could say that the first part describes a real story and the other a fictional, not a real story. </span>
