4. Choose an INCORRECT theoretical statement relating to urban form.

(A) A polycentric city has more employment centers than a pure monocentric city.

(B) The monocentric city is an unsustainable urban form for megacities.

(C) Suppose the city is large, and its population is fixed. Households there will bear more congestion if the city is polycentric but not monocentric.

(D) The advent of mass rapid transit (e.g., London Underground) allowed the monocentric city's feasible radius to expand.

Hint for explanation: Consider the definitions of the terms and the amount of necessary commute to work.