If there are disputes over authority between local, states, o rthe national government, how are the disputes resolved?
a)the executive branch votes on the issue?
b)the judicial branch rules on the issue in court?
c)the legislative branch votes on the issue?
d)the executive branch has the final say?

B) The Judicial branch rules on the issue in court.

Explanation:

In the United States, there are few cases in which the Supreme Court hear cases because most of them are resolved at the state or local level, however, when there are disputes over authority between local, states or the national government or inter-state conflicts, or controversies affecting Ambassadors, public Ministers, and Consuls, the Judicial Branch may rule on the issue in court.

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."