The Early Nineteenth Century in America Is Known as the "Turnpike

The early nineteenth century in America is known as the "turnpike era" because

A) most towns and villages became connected by a network of inexpensive roads.
B) concrete was first developed as a long-life road surface.
C) many roads were built for profit by private companies.
D) the federal government provided free land to road construction companies.
E) Americans stopped transporting goods by canal in favor of roads.