The building of a railroad network led to industrial growth because

Araw materials and finished products were shipped quickly and cheaply
Bfinished products were shipped quickly to rural Canada
Cfinished products were shipped quickly and cheaply to factories
Draw materials were shipped quickly and cheaply to consumers.

Verified Answer :

The building of a railroad network led to industrial growth because "a. raw materials and finished products were shipped quickly and cheaply," since prior to this the main source of large-scale shipping was on river boats and horses. 

the answer to this questions is letter A