Which of the following did NOT contribute to the decision by US leaders to enter World War 1? A)
strong economic ties to nations involved in the conflict
B)
interest in colonizing areas of Europe and Asia
fear of a German military alliance with Mexico
D)
unrestricted German submarine warfare

B.

Explanation:

The US entered World War because of German's unrestricted submarine warfare. After the German submarine attacked the Lusitania ship that was carrying 128 American passengers, President Wilson decided to enter World War I. Another reason to enter World War I was that German was trying to influence Mexico to an alliance with them against the US.

The reason which did not contribute to the decision of US leaders entering World War I was interested in colonizing areas of Europe and Asia.

Thus option B is correct.

your answer would be (b)

it proved indian land claims were unjustified.