What was the primary reason that America ventured out into the world and intervene in China, in Latin America, and elsewhere around the turn of the 20th century and in subsequent decades? a. To free peoples from brutal dictators for no other reason than humanitarian concerns. b. To protect Southeast Asia from Japanese and Chinese imperial control, as well as to liberate Cuba and Haiti so they could determine their own paths. c. To secure its economic interest. d. To pre-empt an attack by China, which the U. S. believed was plotting to invade the U. S.

C.

Explanation:

The reason behind America's venture into the world and intervening in China, Latin America, and other places in the first half of the twentieth century was to protect and secure its economic interest.

The United States has been in a regular commerce trade with China and Asiatic countries. When the United States saw that other powers such as Japan, Russia, Great Britain, German, Italy, and France were trying tobring China under its influence, America developed an Open Door Policy. Under this policy, America gave an invitation to other Western powers to have equal access to trade with China. Latin America, China, and many other nations were seen as an opportunity to secure American economic interest.

Therefore, option C is correct.

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."