Why did president wilson think the US should join ww1?

The combined effect of the Zimmerman telegram and renewed attacks on American shipping are seen by historians as the immediate catalysts for pushing the United States to war.

Explanation:

When war broke out in Europe in 1914 President Wilson declared that the United States would follow a strict policy of neutrality. This was a product of a longstanding idea at the heart of American foreign policy that the United States would not entangle itself with alliances with other nations.

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increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b