the correct conjunction is "which"
Answer:
C. The biographer might not have access to the subject's personal records.
Explanation: All the other options indicate an authorized biography, meaning one that the subject is aware of or has given their approval to.
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.