In 1931, japan began its aggressive policy of expansion by invading

The correct answer is Manchuria, China. Japan invaded Manchuria from September in 1931 to February in 1932.

Japan invaded Manchuria

i would say your answer would be the second option.

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world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation: