Answer:
C.
Explanation: It is right.
Its been a while since I did this topic, but I believe it was mostly because under communism there was little work for intellectuals, so they were often the ones who left the country. This resulted in a 'brain drain', a lack of knowledgable people. I seem to remember reading about the entire maths department of a university just up and leaving at one point. You could also argue that it was damaging for the image of communism if so many people were trying to leave.
The correct answer is C. quotation marks
Using quotation marks forces the search engine to search only for websites that have that specific phrase. If you don't use them then it will also search for those websites that have only parts of the phrase, but using the marks makes it better for your search.
This is true. The word that is used in the UN charter to refer to them is "recommendations', and they are in fact not binding, but more like suggestions.
