The are berber descendants who are also known as the “blue people.” a. bedouin b. san bushmen c. dogon d. tuareg

The answer is: D. Tuareg

The nickname 'blue people' came form the fact that they use  indigo-dye colored clothes  as their traditional clothing. The ink that they use to color the clothes often time stains their skin and change this color. When people that are not familiar with their culture see this, they simply called them as the 'blue people'.

answer; all over the above; //everybody