The correct answer is C) Arabian merchants could conduct trade over wider areas.
Islamic expansion most likely affected trade in Arabia in that Arabian merchants could conduct trade over wider areas.
The expansion of Islam into many other territories facilitated Arabian trade. Previously, that was complicated but new territories meant new consumers and clients. Muslims used the Arabic currency, the Dinar. Those were gold coins. There were also Dirham that was silver coins. With new territories and routes, Muslim merchants could trade spices, salt, sugar, textiles, and slaves, using the Silk Road.
The other options of the question were A) trade became the main work of the Arabian population. B) large numbers of people migrated to Arabia to engage in trade. D) Arabia established itself as the leading trade center of the world.
