(19) All of the following were true of the growing cities of the late 19th century EXCEPT: a new types of transportation produced new or worsening environmental problems b expansion often occurred in an orderly and organized manner c the construction of sports amphitheaters, schools and museums promoted excitement and cultural uplift d the wealthiest individuals built mansions and townhomes in certain areas of large cities, like NYC's Fifth Avenue e most of the population lived in crowded tenements

b. expansion often occurred in an orderly and organized manner  

Explanation:

The expansion of cities did not always occur in an orderly and organized manner, most of the time this process occurred with the growth of marginalized areas where people were huddled without any type of infrastructure and basic living conditions, sanitation, housing and even essential things like water and proper food.

It took years for cities to expand in an organized manner and often this organization is still flawed, even today.