The correct answer is C. The cultural beliefs of the characters. Cultural beliefs are always related to a certain period in time and keep changing. This is why we can find out what the historical context is by analyzing what the society values. The other answers are mostly universal.
Ender's Game is a series of military science fiction books written by Orson Scott Card. The story shows the future time wherein mankind is endangered after conflicts with alien species. In the Ender's Game, the possible human rights issue involved here would be genocide. Genocide means the deliberate killing of a large group of people in a particular nation or group.
He refused the offer because of his peers