Hey there!
Your correct answer is:
B. to find a water route to the Pacific.
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<span>During the 1930s, the combination of the Great Depression and the memory of tragic losses in World War I contributed to pushing American public opinion and policy toward isolationism. Isolationists advocated non-involvement in European and Asian conflicts and non-entanglement in international politics.</span>
If this is during WWI then this could spread to widespread war because of the alliance systems
They grew crops, and started expanding, turning more colonies around into bigger ones, to eventually create the whole 13. They were still under persecution from England, so eventually, they decided to come together and form their own government, and write the constitution.