which event had the immediate effect of causing germany to declare war on the allies?\nthe berlin conference…

which event had the immediate effect of causing germany to declare war on the allies?\nthe berlin conference of 1885 sets off the “scramble for africa.”\nrussia mobilizes its forces on germany’s eastern borders.\ngreat britain declares war on germany.\nthe austrian archduke is assassinated.
Answer
Brief Explanations:
When Russia mobilized its forces on Germany's eastern borders, Germany, fearing a two - front war, declared war on the Allies. The Berlin Conference was about Africa's partition and not related to Germany declaring war on the Allies. Britain declaring war on Germany was a result of Germany's actions, not the cause of Germany declaring war on the Allies. The assassination of the Austrian archduke led to Austria - Hungary's actions and the start of the war, but not directly to Germany declaring war on the Allies.
Answer:
Russia mobilizes its forces on Germany’s eastern borders.