The correct aswer is B. Different regions adopted Arabic coins for doing business.
Explanation
The Middle Ages was a period that spanned from the 5th century BC to the 15th century AD. During this period, the center of the world was Europe where all markets, ports, churches, among other services and products, were concentrated. During this time, many Muslim Arabs were dedicated to trading with different products brought from the Middle East such as spices, animals, fabrics, among other products. For this reason, many of the transactions were carried out in the main currency that they used in their countries, the Arab currency. According to the above, the correct answer is B. Different regions adopted Arabic coins for doing business.