The early hypothesis of was based on observations that suggested continents were once joined together. later, the theory of explained why large pieces of earth's surface move around and how many of earth's features form.

The early hypothesis of Alfred wegener was based on observations that suggested continents were once joined together. later the theory of plate tectonics explained why large pieces of earths surfaces moves around and how many of earths features form.
but i this case c. continental drift and plate tectonics

Ithink the answer is a or d.