Answer: Because they had never developed immunities to the disease
Lusitania was an important event in World War I. The death of so many innocent civilians at the hands of the Germans galvanized American support for entering the war, which eventually turned the tide in favor of the Allies. The Lusitania was a British luxury cruise ship.
The United States has gradually continued to sail on a path of gradual economic globalization. After World War 2 in 1945, the society made a shift from a wartime economy to encourage fewer government regulations in Business.
This increased integration of the United States into the world economy resulted in a massive impact on the continued globalization and varied world economic structures.
The answer to this question is... A.
