Why Is Khaizuran,the Traveler in This Chapter,so Important to Historians

Why is Khaizuran,the traveler in this chapter,so important to historians?

A) Finding sources written by women is unusual.
B) She tells what a slave's life was like in the house of a Muslim caliph.
C) She represents a small Muslim sect about which little is known.
D) Much can be learned from her about life in a harem.
E) Sparse history of the ordinary classes and of women is available to historians.