Question

Which of the following statements best matches the key principle of Walter Christaller’s central place theory?
A.
The size of a settlement is tied to the services it can offer.
B.
A settlement's income per capita increases in proportion to the cost of living.
C.
The size of a settlement increases as the settlement's income per capita increases.
D.
A settlement's income per capita increases in proportion to the total goods and services produced by the settlement.