Please answer quickly!
Squatter settlements exist in the periphery of cities in less developed countries because

(A) city governments set aside vacant areas for new migrants

(B) people want to live near the center of the city, where jobs are located

(C) affordable housing is not available elsewhere for new migrants to the city

(D) new migrants prefer to live in squatter settlements with other recent migrants

(E) new migrants need to be isolated from other city residents until they adjust to urban life