Answered

Which development resulted in the spread of disease and increased mortality rates during the Industrial Revolution?

ADevelopment of pasteurization
BSpread of social reform movements
CIncreased social stratification
DOvercrowding in cities

Verified Answer :

One of the things that resulted in the spread of disease and increased mortality rates during the Industrial Revolution was the "Overcrowding in cities," since this meant that diseases did not have to travel very far in order to infect their next host. 

Answer:

Overcrowding in Cities (apex)

Explanation: