Which Is an Example of Interstate War

Multiple Choice

Which is an example of interstate war?

A) A government committing acts of genocide against an ethnic group,where several thousand civilians are killed.
B) A government fighting a well-armed rebel group within its territory,where several thousand soldiers have died on the battlefield.
C) Two governments fighting each other,where several hundred soldiers have died on the battlefield.
D) Two governments fighting each other,where several thousand soldiers have died on the battlefield.
E) A government engaged in counter-insurgency activity against an international group that employs terrorism,in which several thousand people on both sides of the conflict have died.