Which Fact First Gave Alfred Wegener the Idea That Continents

Which fact first gave Alfred Wegener the idea that continents have drifted and are still drifting over Earth's surface?

A) The ocean floors were much younger than the continents, indicating that they were still being formed.
B) The shapes of the east coasts of North and South America fit nicely against those of the west coasts of Europe and Africa.
C) A system of mountains and faults running up the middle of the Atlantic seafloor showed evidence that the crust was spreading apart there.
D) Volcanoes and earthquakes were localized into a well-defined "ring of fire" around the Pacific Ocean and other areas.

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