Which of these new weapons was instrumental in drawing the United States into World War 1?

poison gas

submarines

machines guns

aerial bombers

B.) Submarines

Explanation:

Germany broke its promise to the United States to stop attacking passenger ships (unrestricted submarine warfare). German leaders knew America entering the war would increase the strength of Allied Powers.

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the answer is d. tariffs were raised by america's trading partners after the smoot-hawley tariff act, decreasing exports, and declining job rates.

length of the cultivating season was not a problem of new england agriculture