Answer:
Slavery caused America to split, many deaths, and people to feel betrayed by their fellow humans and country.
Explanation:
"<span>There are still political colonies that encourage ethnic conflict" is the best option for the most likely reason </span>there are still acts of genocide in the world today, since this has been true throughout history.
The causes of World War I, also known as the Great War, have been debated since it ended. Officially, Germany shouldered much of the blame for the conflict, which caused four years of unprecedented slaughter. But a series of complicated factors caused the war, including a brutal assassination that propelled Europe into the greatest conflict the continent had ever known.
The murder of Archduke Franz Ferdinand outraged Austria-Hungary.
In June 1914, Austrian Archduke Franz Ferdinand and his wife Sophie traveled to Bosnia—which had been annexed by Austria-Hungary—for a state visit.
On June 28, the couple went to the capital city of Sarajevo to inspect imperial troops stationed there. As they headed toward their destination, they narrowly escaped death when Serbian terrorists threw a bomb at their open-topped car.
I think its letter B but im not 100% sure of it
