The correct answer is - C. super continent.
Super continent is a term used when we refer to a land mass that is consisted of all the modern day continents. In the past, a super continent actually existed, it is named Pangaea (Pangea), and it is the ancestor of the modern day continents, Pangaea existed during the late Paleozoic and early Mesozoic eras, approximately from 335 million years ago until 175 million years ago when it started to break up which created the continents we know today.