Answer:
D) the decreasing neutrality of the U. S. in World War I.
Explanation:
The United States had declared itself neutral in the face of the European conflict. But he almost abandoned this decision in 1915, when a German submarine sank the Lusitania, an English transatlantic in which more than a thousand people died, many of them American citizens. The people of the USA He asked to declare war on Germany, but President Woodrow Wilson only protested. Germany promised not to sink more merchant ships, but because it did not comply with this agreement, the United States declared war on it in April 1917.
