According to the theory of continenal drift, why do the coastlines of Africa and South America appear to fit togetherso well?
A. Africa and South America used to be joined together, but split apart long ago.
B. Africa and South America are drifting towards each other and will soon fot together perfectly.
C. Ocean currents on either side of the Atlantic have eroded the coastlines into the same shape.
D. The theory does not explain why the coastlines seem to match.