Answer:
Last option.
Low demand means low prices for oil, which hurts the economy.
Explanation:
The law of supply-and-demand tells us that lower demand means lower prices, and higher demand means higher prices.
One such event would be the famous March on Washington, which took place in 1963 and included a speech by Martin Luther King Jr. It showed that African Americans were taking matters into their own hands when it came to obtaining jobs and freedom.
I believe it was because, that was such a great victory for the colonists over the British that after it was all over, everyone had heard about it. Hope this helps.
The Union won the battle.