All of the Following Gave Rise to a More Dynamic

All of the following gave rise to a more dynamic, market-oriented, national economy in early nineteenth-century America except  

A) the push west in search of cheap land.
B) government regulation of all major economic activity.
C) a vast number of European immigrants settling in the cities.
D) newly invented machinery.
E) better roads, faster steamboats, further-reaching canals, and tentacle-stretching railroads.