In his later phase of dramatic career, Yeats began experimenting

In his later phase of dramatic career, Yeats began experimenting with techniques,such as the use of masks, of ritualized actions, and of（）language together with the combination of music and dance.
A、mystic
B、serious
C、​symbolic
D、simple
【正确答案】：C
【题目解析】：在叶芝戏剧性的职业生涯后期，他开始试验一些技巧，比如使用面具，仪式化的动作，以及象征性的语言和音乐和舞蹈的结合。