HOW does the section "More people move to the cities" relate to the section "Dirty, stinky city air A

The first section outlines actions of people moving to cities and the next section shows their reactions.

B

The first section compares cities in England and the next section contrasts them with the United States.

C

The first section explains what caused more people to move to cities and the next section describes the effects.

D

The first section describes problems of people moving to cities and the next section explains the solutions.