Question

1 point
what historical event happened on september 11, 2001 in the united states?
○ the stock market crashed.
○ the columbia space shuttled exploded.
○ terrorists attacked the united states.
○ hurricane katrina struck new orleans.
1 point
which war was fought by the united states in the 1900s? *
○ civil war
○ world war i
○ revolutionary war
○ mexican-american war

Explanation:

For the first question: The stock market crash referenced is typically 1929, the Columbia shuttle disaster was 2003, Hurricane Katrina was 2005. The 9/11 attacks were terrorist strikes on the US on September 11, 2001.
For the second question: The Civil War was 1861-1865, Revolutionary War was 1775-1783, Mexican-American War was 1846-1848. World War I took place from 1914-1918, within the 1900s, and the US joined in 1917.

Answer:

1. Terrorists attacked the United States.
2. World War I