Why was the Christian Kingdom of Axum left independent while Muslim armles conquered surrounding countries?
Select the best answer from the choices provided.
A. According to legend, Axum offered shelter to the family of the prophet Muhammad.
B. Axum proved too difficult a country to conquer due to its superior weapons.
C. Axum had already been conquered by European powers.
D. Muslim armles avoided Axum because it was geographically isolated.