What Is the "Silver Rule" in the Confucian Tradition

What is the "silver rule" in the Confucian tradition?

A) "Look at nothing contrary to ritual; listen to nothing contrary to ritual; say nothing contrary to ritual; do nothing contrary to ritual."
B) "What you would not want for yourself, do not do to others."
C) "Do unto others what you would have done unto you."
D) "The virtue of the exemplary person is like the wind."
E) "Respect without ritual becomes tiresome, circumspection without ritual becomes timidity, bold fortitude without ritual becomes unruly, and directness without ritual becomes twisted."