I would say B because the other options don't seem likely.
Most of the young adults in the United States are more likely to learn about politics from their family members, school, social media, their community, and even in Church. Many people get their information and news from shared friends on social media such as Twitter and Facebook.
The United States was the last of the "Great Powers" to mobilize it's troops.
The reason was because of Trench Warfare and the stalemate it had caused.
