Answer:
C. A giant landmass that existed over 250 million years ago
Explanation:
Pangea was the Earth when the continents were mainly together and there was only one "continent".
Pangaea was a supercontinent that included all the landmasses n earth. The supercontinent was surrounded by super or mage ocean Panthalassa. It existed some 299 million years ago.
Hence the option A and C are correct.
Learn more about the best describes Pangaea.
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