Which of the following enabled West African to conduct business across the Sahara?

To determine which of the following enabled West Africans to conduct business across the Sahara, you will need to review the provided options. Please provide the options so that I can assist you in finding the answer.

The main factor that enabled West Africans to conduct business across the Sahara was the use of camels. Camels, known as the "ships of the desert," were well-suited to travel across the arid and harsh conditions of the Sahara. They could carry heavy loads and survive for long periods without water, making them ideal for trade and transportation. The introduction of camel caravans in the 8th century facilitated the exchange of goods and ideas between West Africa and North Africa, creating a network of trade routes known as the Trans-Saharan trade.