Correct Answer :
C. disingenuous, victims
The situation due to the genocides is sinister, which means threatening. So the other word which will fill the first blank has to complement sinister. Thus the options which may fit in can be disingenuous (which means lacking in frankness, candor, or sincerity) or tragic. The other three words are positive words.
In the last part of the sentence, 'to ……………. and perpetrators alike' the contrast between the blank word and perpetrators (to commit: to perpetrate a crime) is quite clear. So the correct option is victims, which is antonym to perpetrators.