Answer:
During the year 1901, there was a small difference between the deaths and births. As time went forward, the change became more noticeable because there were about 60 thousand births and 25 thousand deaths. There was a period where the deaths were rising in a constant slope, the number of deaths decreased a little before they went up again. During the year 2041, the number of deaths and the number of births were the same. As time went by, there was a time where the number of deaths preceded the number of births.
Hamlet killed Polonius believing him to be Claudius spying him.
It means chief, or princapal
C is grammatically correct
I think quotations are used as pieces of pieces of evidence when a person is writing an essay. It adds to the credibility of your essay, especially if they are cited properly. Aside from that, quotations are used as introductions to topics, to add more impact on the literary piece that you are working on.