The single southern continent was named:
a. gondwanaland
b. pangaea
c. laurasia
d. north america

I believe the single continent was called Pangaea.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

Which statements are there