Answer:
Option C, the closing of the western frontier, is the right answer.
Explanation:
An argument that claimed that American democracy was established by the American frontier came to be known as the Frontier Thesis. This argument was presented by historian Frederick Jackson Turner in the year 1893. He argued that the primary result of the American frontier was American democracy along with a lower interest in high culture, violence and egalitarianism.
On August 5, 1861, President Lincoln imposes the first federal income tax by signing the Revenue Act. Strapped for cash with which to pursue the Civil War, Lincoln and Congress agreed to impose a 3 percent tax on annual incomes over $800.
Answer: commander in chief
Civil disobedience-- Martin Luther King Jr. used civil disobedience learned from men like Gandhi, Thoreau, and the teachings of Jesus Christ.
The method of civil disobedience uses boycotting, sit-ins, and non-violent protest. Martin Luther King Jr. organized the Montgomery Bus Boycott which was a boycott of the bus system started with Rosa Parks disobedience on segregated buses. It effectively attacked large economic systems which created change due to loss of income.