During the First World War, the group of Americans who faced hostility were the <u>German Americans. </u>
During WWI:
Germany tried to get Mexico to attack America
America joined the war on the side of the British against the Germans
As a result of this, many Americans began to see German Americans as the enemy and this led to a lot of hostility towards them that sometimes became mob violence.
In conclusion, German Americans faced a lot of hostility during WW1.
The statement that best explains the reasons for building the Panama Canal across the Isthmus of Panama was to shorten sailing time between the Atlantic and the Pacific Oceans. The correct answer is B.