The answer is The increased opposition to war.
Nixon was not popular with his foreign policy of war to fight communists. During his term, people held numerous strikes that showed that the people were against its implementation. They don't want numerous soldiers to get involved and suffer. They also don't want people from foreign lands to lose their lives because of this.
It was c because they was the first one I am 98℅ sure.
The increased use of barbed wire fencing blocked cattle drives
Technology has deeply affected the global economy and its usage has been linked to marketplace transformation, improved living standards and more robust international trade.
