Which of the following was developed last?
a) steam-powered riverboats
b) railroad systems
c) canal systems
d) stagecoaches

canal systems ( C )

Explanation:

The modern canal systems was last developed in the 18th century and early 19th century and these modern Canal systems were developed during this period in response to the industrial revolution in Great Britain.

The development was to ensure the safe and speedy passage/transportation of goods and services in very large quantities to other parts of the world . the railroads were also invented in the early 18th century ( 1827 ) in America for the transportation of goods and people between the cities of Ohio and Baltimore. other inventions came earlier as well .

it the big letter b heart my answer