C - Segregation
seg·re·ga·tion
noun
the action or state of setting someone or something apart from other people or things or being set apart.
"the segregation of pupils with learning difficulties"
From Oxford Dictionary
Answer:
n 1946, Winston Churchill gave a speech in which he declared that Russia had built an "Iron Curtain" separating eastern Europe from western Europe. ... Churchill's term became the standard for describing Soviet-controlled Eastern Bloc nations during the Cold War.
The correct answer is A. a primary group.
Primary group refers to individuals following other people's example when doing something. Here, Mary started using the language of that particular group and dressing like them. Thus, they represent her primary group in her life.
If you are unsure about what this question means, then I think I can help you.
What this person (I'm assuming a possible employer, or perhaps a person you talk to in order to obtain a Visa) means by this question is whether you are actually authorized to work in that particular country. So, for example, if you live in the US, but want to move to, let's say, Japan to work, you will probably get this question. It means that the employer may give you a sponsorship to help you get a working Visa for that country. If you don't require such sponsorship, it means that you already have such a Visa and can work in the country already.
A and B because the water busts glides down fast and smooth and B because it'd it were a lot of water the mass would outweigh the speed