Which of the following best explains how the alliance system contributed to the outbreak of world war 1 -alliances had limited trade causign economic problems -rival alliances had promoted tension rather then security -alliances had failed to prevent food shortages -allies had been plotting to each other conquer neighboring territories

Rival alliances had promoted tension rather than security

Explanation:

The opposing coalition brought about pressure instead of safety. Allies, however, did not conquer with other different territories; instead, it left the Germany alliance stranded between two prominent partners that were likely to come in any moment. Further other countries had a coalition that resulted in tension because of the outlook of the nation. For instance, Germany allied to Australia-Hungary and Russia. Nevertheless, Ally encouraged them to continue with the fight even though it caused tension to other countries.

the event that was most responsible for ending the great depression is world war 2.

what are the options?