Which describes a bubble?

Explanation:

A bubble is a run-up in the price of an asset that is not justified by the fundamental supply and demand factors for the asset. Bubbles can occur in any traded commodity or financial instrument. A partial list of past bubbles includes: Commodities: gold, sugar, coffee, cotton, wheat. Debt: various government bonds. Hope that helps!!!

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity

hey i did something like that before, what is the quesiton?