What did the songhai empire begin to trade?

1019

Explanation:

It was a great cosmopolitan marketplace where kola nuts, gold, ivory, slaves, spices, palm oil and precious woods were traded in exchange for salt, cloth, arms, horses and copper. Islam had been introduced to the royal court of Songhai in 1019, but most people remained faithful to their traditional religion.

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.

the answer is c, all the other options are things they are known for.

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