Question

In 1917, the United States entered World War I after _______.

• A. It learnt about German plan to seize control of U.S. territories in Southeast Asia
• B. it came to know about German plan to launch a surprise attack on U.S. naval forces
• C. it came to know that Germans would help Mexico retake land it had lost to the United States
• D. German submarines sank US ship Lusitania
• E. All of these

Answer 1

The correct option is D German submarines sank US ship Lusitania

In 1917, USA entered World War 1, after repeated warnings given to Germany, as it was sinking merchant ships and later, Germany sunk Lusitania, an american boat, after that event President called for a declaration of war against Germany and was granted by the congress.