The fourth alternative is correct (D).
The "Pangeia" of the Greek Pan "all", and Gea or Geia, "earth" meaning "All the Earth", was a colossal solid mass that formed a single continent, which in turn was surrounded by a single ocean, the Pantalassa.
This continental mass formed until the end of Permian period, between 300 and 250 million years, when finally it was divided in other continents.