What Statement Is True About the Crime of Genocide

What statement is True about the crime of genocide?

A) The Convention on Genocide lays out specific actions that the international community must take in response to declared genocides.
B) Since the Convention on Genocide was adopted, mass killings have been prevented.
C) Despite mass killings, no peacekeeping force was sent to Darfur, Sudan.
D) In the cases of Rwanda and Darfur, politicians intentionally did not use the word "genocide" to describe the events.
E) No interventions have ever been undertaken in response to mass killings.