What does "code" in line 7 mean

A．no students cheated in the exams
B．many students broke the honor code
C．only one student was found cheating
D．few exams were motioned by instructors

A．No one fights to protect his reputation today.
B．People are more consciences in the politics of their company and government.
C．People are becoming indifferent of the sense of honor.
D．People have a clear standard of honor today;