Using the theory of continental drift, scientists have proposed that about 200 million years ago the continents were once joined together in a supercontinent called
a. pangaea.
b. panthalassa.
c. laurasia.
d. gondwanaland.

The correct answer is Pangaea which is a A former “super-continent” on the Earth. In the distant past a large landmass, Pangaea, included all the present continents, which broke up and drifted apart it is now 7 smaller continents 

200 years ago the continents split otherwise known as pangaea