Which of the following saw 200 U. S. troops, including George Custer, killed in
20 minutes by Native American warriors?
A. Dawes Act
B. Fort Laramie
C. Little Big Horn
D. Sand Creek

The answer is C- Little Big Horn. This was a devastating battle for the United States, as it saw the death of General George Custer. This battle is also known as Custer's Last Stand, and saw the defeat of the U.S army and loss of 268 troops.

I hope this helps! :)

the answer is b for brother