Answer:
B: A family moral
Explanation:
The best example of a principle is a family moral.
A journal written by frontier settlers will most likely not mention Manifest Destiny much. This was an idea that permeated policy, but it was rarely openly stated, especially among common people. However, the journal is likely to mention some ideas related to Manifest Destiny, such as the superiority of Western culture.
A journal of this type is also likely to mention how life was at the "frontier" and how American Indians struggled to keep their lands. It would also outline the difficult situations that settlers faced, such as being alone, being exhausted and being attacked by Native Americans.
Young people are very impressionable, meaning that they are easily swayed by what they see around them or on TV or some other mass media. If they see a certain behavior via the media, they will believe that is what they should be behaving, believing, or valuing. They are constantly surrounded by various scenes of everyday lives of celebrities, and they often strive to behave the same way they do. Media can be quite important in influencing young people's minds so as to believe what the media is spoonfeeding them.