This part is so hard can anyone help me with this part please​

What two bodies of water were connected by the panama canal

How did the united states ironically create a slaverybased market economy and democratic political system?

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