Which of the Following Explains Why the U

Which of the following explains why the U.S.army gunned down unarmed Sioux at Wounded Knee Creek,South Dakota in 1890?

A) It was rumored that the Indians were waiting to ambush the troops.
B) American soldiers feared an uprising provoked by a militant interpretation of the Ghost Dance religion.
C) The Sioux had refused to sign a new treaty that relinquished land surrounding the Creek.
D) Troops had been ordered to wipe out all Native Americans in the area.