I don't know the answers to these questions. I answered the others but need help with these 5.

Question 1

Which transportation development had the greatest long-term impact on the American economy?

Steamboat
Canal system
Horse-drawn cart
Steam locomotive

Question 2

Improvements in transportation led to

lower shipping costs for goods
fewer settlers moving westward
increased communication times
higher prices for empty lands

Question 3

Americans remember Robert Fulton for building a workable

horse-drawn cart
canal system
locomotive
steamboat

Question 4

Maryland and Illinois were connected through the

U.S. National Railroad
U.S. National Skyway
U.S. National Canal
U.S. National Road

Question 5

Most workers for the Central Pacific Railroad were

Irish
French
German
Chinese