How did the Berber traders contribute to the establishment of kingdoms of Mali, Ghana and Songhai?

A)Berber traders traded the gold with Mediterranean traders who colonized the Sub Saharan regions and established their empires.

B)Berber traders would trade for slaves with Sub Saharan regions; the slaves would spread stories of their kingdom and their richness in gold.

C)The Berber traders would spread stories of magnificent kingdoms of the Sub Saharan regions, which increased the demand for gold from these regions.

D)The Berber traders encouraged their ruler to conquer the Sub Saharan
regions.

In witch of these areas were the early bantu successful in part to there iron working skills ? check all that apply -agriculture -gathering -navigation -trade -warfare

Can you summarize this? it takes time and caution to perfect anything which must be concealed. it takes time to crush men who are pursuing legitimate trade. but one of mr. rockefeller’s most impressive characteristics is patience. there never was a more patient man, or one who could dare more while he waited. the folly of hurrying, the folly of discouragement, for one who would succeed, went hand in hand. everything must be ready before he acted, but while you wait you must prepare, must think, work. "you must put in, if you would take out." his instinct for the money opportunity in things was amazing, his perception of the value of seizing this or that particular invention, plant, market, was unerring.

What is the name of the social stratification set up by the vedic peoples of the indus river valley civilization