Suspension bridges because they never were in land no ocean or river
Answer:
C) They each had one of the commodities but not the other, so they needed their trading partner to provide it
Explanation:
Given that the Arab nations along the Mediterranean Sea possess the capacity to mine salt, but not gold, while they value gold as a means of wealth and riches, the sub-Saharan African region, in contrast, can mine gold but not salt, while they value salt in making preservations and food cooking. Thereby there is a need for the two regions to be trading partners to provide their needs.
The south had this river as a transportation link.
