Most of the dead were Tutsis - and most of those who perpetrated the violence were Hutus.
Even for a country with such a turbulent history as Rwanda, the scale and speed of the slaughter left its people reeling.
The genocide was sparked by the death of the Rwandan President Juvenal Habyarimana, a Hutu, when his plane was shot down above Kigali airport on 6 April 1994.
A French judge has blamed current Rwandan President, Paul Kagame - at the time the leader of a Tutsi rebel group - and some of his close associates for carrying out the rocket attack.
<span>"Federal" refers to a system in which all of the states are independent in a sense, and power is shared between the state government and national government. Therefore, "D" is the correct answer.</span>
