What Is the Difference Between 'Ethnography' and 'Ethnology

What is the difference between 'ethnography' and 'ethnology'?

A) Ethnography is the in depth account of a people's culture and society, while ethnology is the cross-cultural comparison of different peoples.
B) Ethnography is the in-depth account of a people's culture and society, while ethnology is the in-depth account of a people's biology.
C) Ethnology is a highly numerical science in comparison to ethnography.
D) Ethnography focuses on simple societies, while ethnology focuses on complex societies.
E) Ethnology is actually the same as ethnography; they are two words for the same thing.