The three correct answers that provide evidence that South America, Africa, Antarctica, and Australia were once together as one supercontinent are:
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Glacial deposits and scratches in the bedrock from an ice sheet match in distant regions.
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Fossils of marsupials were originally the same across South America and Australia.
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Cratons match across the edges of continents.
These pieces of evidence support the theory of plate tectonics and the existence of the supercontinent Pangaea.