The axum civilization used that were of equal value of the roman empire's currency to facilitate trade relations.
a. spices
b. coins
c. goats
d. stelae

B. coins

Explanation:

The Kingdom of Aksum was an old kingdom situated in what is presently Tigray Region (northern Ethiopia) and Eritrea.

Axumite Emperors were amazing sovereigns, styling themselves King of lords, ruler of Aksum, Himyar, Raydan, Saba, Salhen, Tsiyamo, Beja and of Kush. The kingdom existed from roughly 100 AD to 940 AD. The commonwealth was focused in the city of Axum and developed from the proto-Aksumite Iron Age period around the fourth century BC to accomplish noticeable quality by the first century AD.

Aksum turned into a noteworthy player on the business course between the Roman Empire and Ancient India. The Aksumite rulers encouraged exchange by printing their very own Aksumite currency (coins), with the state setting up its authority over the declining Kingdom of Kush.

answer: you could try asking a family member maybe?