The young lady is interviewing Lin Zhixuan about the program I am a singer is from 21st Ce

问题补充：

The young lady is interviewing Lin Zhixuan about the program I am a singer is from 21st Century Talent Net.

A. who

B. whom

C. which

D. whose

答案：

(答案→)A. who

B. whom

C. which

D. whose

解析：句意：这位正在就我是歌手这个电视节目采访林志炫的年轻女士来自21世纪天才网。结合语境可知本句中先行词the young lady为下文定语的逻辑主语，指人，故选A。