The basic approach in marginal analysis is to compare a policy's total benefits with its total costs

If a supply curve is a horizontal line, supply is said to be

A) unit elastic. B) inelastic. C) perfectly elastic. D) perfectly inelastic.

Which statement is true?

A. More than any other region in the nation, the South prospered the most in the years following the Civil War. B. The transcontinental railroads that were completed in the 1860s, 1870s, and 1880s, all bypassed the South. C. Before the Civil War most of the nation's large farms were located in the North. D. None of the choices are true.