ASA What is meant by gentrification?
(A) The migration of people from rural areas to urban areas to find jobs
(B) The restoration of lower-income neighborhoods to attract middle-class residents
(C) The deterioration of a neighborhood over time due to poor maintenance
(D) The conversion of residential areas to commercial real estate

the correct answer of this question is A

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.