Since human beings in the paleolithic period had no domestic animals:
a. they had no significant wealth beyond what they could carry.
b. they used wild animals as beasts of burden.
c. they could be easily ruled by tribal kings.
d. they practiced a policy of "divide, defeat, and conquer."

i think the answer is d, it might not be though. im not completely sure.

the language dates from the contacts of arabian traders with the inhabitants of the east coast of africa over many centuries. under arab influence, swahili originated as a lingua franca used by several closely related bantu-speaking tribal groups.