Which of these caused the united states to grow the most?
a. land won from the mexican war
b. the annexation of alaska eliminate
c. the louisiana purchase
d. the gadsden purchase

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b. the united states should end slavery. c. the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii