Why Have Democracies Been LESS Likely to Sign International Human

Why have democracies been LESS likely to sign international human rights agreements?

A) Democracies are more likely to violate human rights.
B) There have been fewer democracies than dictatorships in the world.
C) Democracies are more likely than dictatorships to resent interference in their domestic affairs.
D) Democracies have not thought it necessary to sign agreements because they already protect their citizens' rights.