The development of Jing Xue was dominated by the___in the early period,the___in the middle period, and___ in the late period. A: external king B: internal sage C: text exegesis D: text

The development of Jing Xue was dominated by the external king in the early period,the internal sage in the middle period, and___in the late period. A: external king B: internal sage C: text exegesis D: outer king