A Significant Difference in Ethiopian Identification Compared to Other African

A significant difference in Ethiopian identification compared to other African nations was

A) It was predominantly Christian for 1500 years.
B) It was predominantly Muslim since the seventh century C.E.
C) it followed indigenous religious practices but remained tolerant of monotheism.
D) It was predominantly Buddhist since trade missions with China in the 16th century.
E) It was religiously tolerant and multicultural with virtually no religious policy.