The answer is D.
There is no single topic sentence within this piece of writing. A topic sentence is used to summarize what is going to be, or what has been written about, and there is no such sentence within this piece.
Introvert= Less sociable, keeps more to self
Extrovert= outgoing, sociable
Personally-
I would say I am about 60% an introvert and 40% and extrovert. When I am at school, I try to keep more to myself. I like to be by myself and focus on schoolwork. When I am with friends I tend to be more extroverted because I am comfortable with them. I talk more, not only to them, but also to people i do not know.
An effective argument includes both, because you have to present your opinion on the topic and then utilize facts to explain your reasoning.
Answer:
I get the impression that even though they were tough they were not tough enough to survive what killed them.
Explanation:
Hope this helps.
