Which of the Following Is an Example of Genocide

Which of the following is an example of genocide?

A) Darfur,where an estimated 400,000 ethnic Darfuris have been killed by government-sponsored militias.
B) Argentina,where the military government from 1976 to 1983 murdered up to 30,000 alleged leftist sympathizers.
C) The U.S.Civil War,in which over 600,000 Americans died.
D) The Bataan Death March,in which 6,000-11,000 soldiers died from brutal treatment and murder.
E) The war during the 1998-2003 conflict in the Congo,which caused the deaths of over 5 million people.