Answer:
The stock market crashed.
B
The National Association for the Advancement of Colored People (NAACP) was at the forefront of efforts to educate the public about the threat posed by the KKK. Such anti-Klan activism was highly effective, and the organization’s membership declined dramatically in the late 1920s.
In the mid-1820s, the Russians signed the Russo-American Treaty of 1824 and the Russo-British Treaty of 1825, and the Spanish signed the Adams–Onís Treaty of 1819, by which Russia and Spain formally withdrew their territorial claims in the region, and the British and the Americans acquired residual territorial rights in the disputed area.
The answers b, another name for Columbus Day. Not 100% but yeah
