C is the answer your looking for!
The 9th Amendment states that even though the Constitution lays out a litany of specific and enumerated rights, it does not limit the people to only having those rights.
In short, the people have more rights than the ones that are specifically listed in the Constitution & Bill of Rights.
The correct word is "precedent"
Many of George Washington's customs that he set while President became the precedent by which other Presidents acted.
The most famous was, until FDR, the two term limit for Presidents.
After FDR, two terms would be codified.
Neo-Confucianism was the revival of Confucianism in the Song Dynasty (Confucianism was discredited for a while after the fall of the Han Dynasty). Neo-Confucianism incorporated certain aspects of both Buddhism and Daoism into its philosophy.
