NOT a major factor leading to genocide: D. distribution of power among ethnic groups.
If that choice said "unequal distribution of power," that would be a different story. But the statement simply lists distribution of power among ethnic groups. That would imply that all ethnic groups have a share in power, which would help prevent one group being able to carry out genocide against another.
The contributing factors that do increase the likelihood of genocide:
- economic, political, or social instability
- unequal distributions of power and resources
- leaders who increase tensions between groups (which would mean an unequal distribution of power among classes).
An example would be the genocide that occurred in Rwanda. The genocide in Rwanda had arisen out of problems created by colonialism in that country. The Dutch colonial government had favored the Tutsi people over the Hutus. (The factor of leaders increasing tension between groups.) That created unequal distribution of power and resources. When the Dutch pulled out of the country, the postcolonial situation was one of great economic, political and social instability. All of this played into the violence by Hutus against Tutsis when the Hutus came into power in Rwanda.