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

others, still angry about the revolution, argued against a commercial treaty with the britain promised to withdraw all of its troops from america after the in the northern frontier, however, the british refused to surrender several military posts on a stronger central government in america may have resolved these foreign.

hope this : d

d) a constitutional amendment