The right event is: B. Axum grows wealthy by controlling Red Sea trade.
What does the rise of the axum tell us
The rise of Axum as the first Christian kingdom in Africa was significantly influenced by its economic prosperity through the control of trade routes, particularly the Red Sea trade. This economic strength enabled the kingdom to adopt Christianity and contribute to its prominence and growth.
The control of trade routes not only contributed to the economic prosperity of Axum but also facilitated cultural exchanges and interactions with other regions.