Question

how did the united states respond when german u-boats sank the lusitania?
○ by entering world war i on the side of the allies
○ by targeting passenger ships belonging to the axis powers
○ by increasing the amount of supplies sent to allied countries
○ by barring all trade imports and exports with germany

Explanation:

1. Analyze Option 1: The US entered WWI in 1917, while the Lusitania was sunk in 1915, so this is incorrect.
2. Analyze Option 2: The US was neutral initially and didn't target Axis (Central Powers) ships as a response to Lusitania; this is incorrect.
3. Analyze Option 3: After the Lusitania sinking, public outrage in the US grew, and the US increased supplies to Allied countries (though still neutral, it leaned toward the Allies), which matches the historical response.
4. Analyze Option 4: The US didn't bar all trade with Germany immediately after Lusitania; it was a gradual shift, so this is incorrect.

Answer:

C. by increasing the amount of supplies sent to Allied countries