What was the main reason that the United States sought to build a canal in Central America in the early twentieth century?
A. To create jobs for unemployed U.S. citizens still struggling to recover from a severe economic depression
B. To improve diplomatic relations with Colombia by helping the country improve its infrastructure
C. To allow goods to be shipped more efficiently between the East and West Coasts of the UnitedStates
D. To prevent Spain from using its powerful navy to control trade in Central America and the Caribbean