I think it's cultural but I'm not sure
B> A European country colonizes part of North America
Answer: Faced with mass starvation among his people, Sitting Bull finally returned to the United States and surrendered in 1883. ... Someone fired a shot that hit one of the Indian police; they retaliated by shooting Sitting Bull in the chest and head. The great chief was killed instantly.
Explanation:
The brutal response of police was widely publicized: it was at the time when television started gaining importance and the protests were reported in the television (and radio) to the whole country.
This actually helped gain more sympathy for the protests and spread the knowledge about them so the people who were also in favor of civil rights knew there were not alone.