20-10SD 阅读 Q35

第2段的functions和以下哪个词意思最相近。
第2段开始写到，君主并不能discharge（perform行使）皇室的职责。function在这里的意思是the job or duty of a person，对应A。
B ceremony: a formal act or series of acts prescribed by ritual, protocol, or convention 仪式
C characteristic: a special quality or trait that makes a person, thing, or group different from others 特征
D outcome: something that follows as a result or consequence 结果