Dying this map of the continents and ridges on Earth. Why do the shapes of parts of Africa, South America, and North America appear to fit together like puzzle pieces?
A. The continents are spreading apart as Earth grows larger.
B. The continents were connected, but a meteor broke them apart.
C.
The continents have a large valley between them that has filled with ocean water.
D. The continents were connected, but expanding mid-ocean ridges have pushed them apart.