The convoy system was a successful strategy by the u. s. navy in the north atlantic to offset the threat of german u-boats. true or false?

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