The answer is A, it's where/when a story takes place
He gets scared. it really rattles him, mentally
It's C!
In most cases you can't put AND after a period but in this case u can.
Answer: The westward expansion resulted in Native Americans move to another place that they did not like. The Westward expansion also drove Native Americans off their land. Many battles was fought and so many lives was lost. Native Americans was eventually forced to live on designated reservations