He should consult an archaeologist. They study ancient studies looking for remains of buildings, objects, people, etc. They learn a lot about our past and what our ancestors were like through archaeology.
C. Citizens must be allowed to overthrow a government that does not protect their rights.
People tried to abide by them and then realized how imperfect we all are, and they realized that we need salvation.
To my knowledge, the correct answer among all of the given choices is C.) Steam. If I'm not mistaken, this was the time that more trains came into use.
I hope this is the answer you were looking for and that it helps!! :)
