I think its B because D-Day stands for Allied landings in Normandy on the 6th of June in 1944.
Answer:
Permanent houses, hospitals, schools and cultivation of crops.
Explanation:
Settling and staying in one area or location allowed humans to make permanent houses where they lived forever because that area has all the facilities available which is necessary for living. Humans also started to cultivate food crops instead of hunting in order to fulfill their food needs. Humans also make hospitals and educational institution for themselves in order to educate their children and maintain their health status.
