The biases of the author are his beliefs, in both practical and religious belief. The way the author might explain happenings in life and the way he thinks might be affected by his belief that God controls everything. His belief will also affect what he thinks will compose a good society.
Via propaganda. They created movies which showed pro war themes... So people were encouraged to go out to fight or be anti German etc by following their examples.
Family
It is the primary socialization agent. The other three are peer, school and mass media.
The family is responsible for inculcating religiuos believes that forms the core of non-material culture. It is from the family, especially the first five years, that the notion of right or wrong is incalcated.
Non-material values are like love,hardwork, ethics,godliness,kindness.
The correct answer is letter C. To assume that all are the same and to categorize is to form stereotypes. Often stereotypes cloud a person's judgment about people around him. This is a very common practice that all individuals do because we associate a lot of things with behavior and physical appearance.