What was the original classification of Kapi in relation to hylobatid?

A. A direct descendant of Yuanmoupithecus
B. A close relative of Yuanmoupithecus, but not a hylobatid
C. Unrelated to Yuanmoupithecus and hylobatids
D. Equally or more likely to be a stem hylobatid as Yuanmoupithecus
Answer: 