What did Austria-Hungary do in 1908 that increased pre-war tensions in Europe? -It annexed Bosnia and Herzegovina.
-It annexed Serbia and Herzegovina.
-It attacked Serbia and Herzegovina.
-It attacked Bosnia and Herzegovina.

The correct answer is A. it annexed Bosnia and Herzegovina.

Explanation

The Austro-Hungarian Empire was a created European State that existed from 1867 under the "Austro-Hungarian Compromise" until 1919 when it was dissolved, giving rise to the states of Austria, Hungary, Czechoslovakia, Fiume, Slovenia, Croatia, and Serbia.

One of the worst crises that the Austro-Hungarian Empire experienced was the result of Franz Joseph I's decision to annex Bosnia-Herzegovina, on October 6, 1908, which caused the discontent of the Serbian community that instead of calming their separatist spirits, embodied a feeling of enmity against the Austro-Hungarian Empire, which would later be seen in the First World War. According to the above, the correct answer is A. It annexed Bosnia and Herzegovina.

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explanation:

answer:   migrations were important in the neolithic period. "two major migrations passing through southeastern europe were confirmed by the means of archaeo-genetic studies."

the first migration was the early neolithic period -- 6,000 before common era (bce) -- when the first farmers, from anatolia -- asia minor -- spread through europe. the second migration occurred during the early bronze age (3,000-2,500 bce) when the so-called "steppe population," from the eurasian steppe, replaced much of northern europe's previous population.

the first farmers of northern and western europe passed through southeastern europe with limited hunter-gatherer genetic admixture, which occurs when two or more previously isolated populations begin interbreeding. however, some groups that remained mixed extensively -- without the male-biased, hunter-gatherer admixture that prevailed later in the north and west, according to latest discoveries. southeastern europe continued to be a nexus between east and west, with intermittent genetic contact with the steppe people up to 2,000 years before the migrations that replaced much of northern europe's population.

"in some places, hunter-gatherers and incoming farmers seem to have mixed very quickly," says iain mathieson, a geneticist at the university of pennsylvania, who was first author of the paper. "but, mostly, the two groups remained isolated, at least for the first few hundred years. these hunter-gatherers had been living there for thousands of years, and it must have been quite a shock to have these new people show up -- with a completely different lifestyle and appearance."