Question

The graph shows the results of German submarine warfare in early 1917.

Line graph showing Allied and Neutral shipping losses in tons in 1917. In January, losses were under 400,000. In February, losses were at almost 600,000. In March, losses were at 600,000. In April, losses were around 900,000.
What is the best conclusion that can be drawn from this graph?

Germany was stepping up its efforts to stop goods from reaching the Allies.
Germany’s U-boat attacks were mostly ineffective in early 1917.
Germany was tired of the war and wanted to reach peace with the Allies.
Germany was seeking to maintain the Atlantic Ocean as German territory.

Answer 1

Germany was stepping up its efforts to stop goods from reaching the Allies.

Reason: the rapidly rising Allied and neutral shipping losses (from under 400,000 to about 900,000 tons in four months) indicate an intensification of U-boat attacks aimed at cutting off supplies.