I Make a Living by Answering Questions

[Title: Four people meet together to perform a sect's reward mission. The alien spies are among them, intending to kill all the people. On a dark and stormy night, a human being was brutally killed. Excuse me, who is the murderer? [Options: A. Zhao Wanwan; B. Wang Ming; C. Gao Xingyi; D. Ning You; E. Give up answering the question] After traveling through time, Ning Qixun began his never-ending journey of answering questions. Life is endless, and answering questions is endless.