听力原文: Rader, 60, of Park City, entered the guilty pleas as his trial was scheduled to
Rader was arrested Feb. 25. The onetime president of the church council at Christ Lutheran Church and Boy Scout leader, Rader admitted killing 10 people in the Wichita area between 1974 and 1991. The serial killer known as BTK -- the self-coined nickname that stands for "Bind, Torture, Kill" -- taunted media and police with cryptic messages. Sentencing was set for Aug. 25.
What is the exact meaning of BTK as mentioned in the news?
A.Bad, Taunt, Cruel.
B.Bang, Troll, Keep.
C.Bind, Torture, Kill.
D.Bun, Tomb, Key.