The answer is B, a set of beliefs and laws, because of what they consist of, like "Thou shalt not bear false witness against thy neighbor" and so on.
Japan<span>: Japan's Yamato dynasty traces its origins back to 660, making it the oldest continuous hereditary monarchy in the world. The 79-year-old Emperor Akihito has reigned since 1989 and is, according to legend, the 125th emperor in his line, though there's some debate as to the exact count of emperors</span>
Mongol invasion of India, 1306
