The three correct answers that provide evidence that South America, Africa, Antarctica, and Australia were once together as one supercontinent are:
- Icy glaciers covered South America, Africa, Antarctica, and Australia as one supercontinent over the North Pole.
- Cratons match across the edges of continents.
- Glacial deposits and scratches in the bedrock from an ice sheet match in distant regions.
These pieces of evidence support the theory of continental drift and the existence of the supercontinent Pangaea.