What gave the kingdom of ghana a military advantage over its neighbors? trade of salt and spices climate and water access iron and horses gold and silver

Today, people of Ghana have come to the land that existed first as 150,000 to 200,000 years ago. At that time, the climate was in a convenient location in today's climate conditions for agriculture and animal husbandry is the same. Sango culture of these groups composed of members of the community began 25,000 years ago, and severe drought which lasted until 13,000 years ago and have left the area due to inability to sustain agricultural activities accordingly. This is the area from the date when a settlement is located along the old legacy scene exactly sure days have been the remains of pottery dating back 5,800 years.

Answer might be b i think