"c. A narrative source" is what a historian would use to get a firsthand account of a past event, since in these sources (which are also primary sources) a person is giving a first-hand account of the event itself.
Egypt, paskistan, central asia, north africa, india, indonesia, and sudan
A is the answer to your question
Answer:
D. To use political prisoners to improve Soviet infrastructure
They are based on nomadic Hunter-Gatherer societies.
