What prompted the United States to join the fighting in world war 1? A. An attack on Pearl Harbor

B. The sinking of American ships in the Atlantic

C. The sinking of American ships in the Pacific

D. The assassination of an archduke

The U.S. entered World War I because Germany embarked on a deadly gamble. Germany sank many American merchant ships around the British Isles which prompted the American entry into the war

Explanation:

America entered WWI because Germany sank many of their ships near the British isles

Explanation:

so B

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

d is the answer. leo should include the source.