Answer:
A. Khoisan
Step-by-step explanation:
The Khoisan are considered the first inhabitants of Africa to the south. Called pejoratively by the European settlers of bushmen (men of the forest), they also have the South of Angola as habitat. Khoisan is the name given to the family of the Khoikhoi and San ethnic groups, which have similar physical and linguistic characteristics. Using clicks as phonemes in their language, their history is estimated to be several thousand years old, but they are now in danger of extinction, with only small populations in southwest Africa.