(Each) employee with (a modicum of intelligence) (would be able to) undertake (such) a basic process.

A．to warn about the dangers of revolutions in towns
B．to warn about the possibility of a population explosion
C．to suggest governments should change their priorities
D．to suggest governments invest in more housing in cities

A．The development of trade routes through United States cities
B．Contrasts in settlement patterns in United States
C．Historical differences among three large United States cities
D．The importance of geographical situation in the growth of United States cities