All of us have read thrilling stories ______ (故事中的主人公只能活一段很有限的时光)．

A．average
B．common
C．mean
D．ordinary

A．Barbiero took the treatment after being told the risk.
B．Dr. Sheldon Pollack started his work with the patients’ agreement to accept the potential risk.
C．A famous doctor should be authorized to use something he thinks okay on patients.
D．Barbiero is suffering a lot