The tactics that the united states used to contain communism in the western hemisphere is :
Aggressive force: By placing our military forces in the region that are a threat of communism
Foreign Aid : By aiding the countries in need to earn their favour
hope this helps
For #1 it is C. They kept expanding into Native American’s land. The natives didn’t like that so that led to many conflicts.
For #2 it is D. People could get to destinations a lot faster and cheaper so it led to spread of people and ideas. It also led to goods being easier to transfer to new markets for new business opportunities.
The media overdoes everything. The media made people terrified which caused harm to Vietnamese culture.