Improvements in transportation led to A. Lower shipping costs for goods
B. Fewer settlers moving westward
C. increased communication times
D. Higher prices for empty lands

A- lower shipping costs for goods

Explanation:

Being that the goods got where they had to be quicker, it was less money to move them

answer; slavery should be outlawed in the new country, was part of the initial draft of the declaration of independence, but not part of the final

a.   it resulted in widespread unemployment.