<span>United Nations was founded in 1945 to replace the League of Nations, in the hope that it would intervene in conflicts between nations and thereby avoid war</span>
the answer is to this question is D
Prejudice and Discrimination. Prejudice is an unjustified or incorrect attitude (usually negative) towards an individual based solely on the individual's membership of a social group. For example, a person may hold prejudiced views towards a certain race or gender etc. (e.g. sexist).
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You didn't add the choices, but I've had this question before the answer is that nearly all of the male immigrants were male, so children came from unions with Native Americans.
The Olmec civilization was located in Mesoamerica, in a region that is now occupied mainly by Mexico. They were a very early civilization that came to prominence around the same time as Mesoamerica was flourishing.