What is known about Nahum's position in the house of the Exilarch?

A. He was the last Exilarch of the Parthian Empire
B. He was the only Exilarch to serve during the 2nd century AD
C. He is believed to be one of the oldest identifiable members of the house of the Exilarch in Babylonia
D. He was the founder of the Exilarch dynasty
Answer: 