The gold- for-salt trade (Answer B) played a significance role in success of west African civilization. The civilization of west Africa was based on trade .The gold was the main commodity in trans saharan trade. traders used to exchange gold for something west African prized more example salt.
Answer: delta
Sediment, like silt and/or sand, are deposited at the mouth of a river and forms river flows into a sea or lake.
Near the sea, these sediments get deposited and due to the water moving thru it, it forms the typical triangular shapes referred to as delta.
States relied on their own constitutions, which often stated very different laws.
I believe it is because they did ban the fact that confederates could not be in office or house of reps.
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-A