What are the things being compared in the following argument? "The United Nations failed to intervene in Bosnia to prevent massive human rights violations and ethnic cleansing. It also failed to act to stop the murders of close to a million innocent people in Rwanda. THe UN will not intervene to stop any widespread slaughter of innocents in Nigeria."

a.
Ethnic cleansing in Nigeria and Bosnia

b.
The slaughter of innocents by the UN

c.
situations in which the United Nations might intervene

d.
Human rights violations in Rwanda and Bosnia