Which of the following occurred in england during the medieval era? a. after the norman invasion, tribal conflicts continued to create the need for britons to lead nomadic lifestyles. b. after the norman invasion, the influence of christianity waned as people sought comfort in the old ways. c. after the norman invasion, increased prosperity led to greater sanitation and healthier living conditions in the cities. d. after the norman invasion, more civilized behavior led to increased commerce and codification of the rights of commoners.