The three correct answers that provide evidence that South America, Africa, Antarctica, and Australia were once together as one supercontinent are:
- Mountain chains match up where South America collided with Australia to form Pangaea.
- Glacial deposits and scratches in the bedrock from an ice sheet match in distant regions.
- Cratons match across the edges of continents.
These pieces of evidence support the theory of continental drift and the existence of the supercontinent Pangaea.