The correct option is
D All of these
Homo erectus lived 1.7million years ago. They had the following characteristics:
1. They stood upright to a height of 150 cms.
2. They had receding forehead with prominent brow ridges
3. The jaws were prognathous without a distinct chin.
4. The cranial capacity was 900cc.
They were hunters and food gatherers, used stone tools for hunting,
lived in caves, learned the use of fire for cooking and used animal skin for
clothing themselves and probably used sign language. They later migrated to different parts of the world from Africa.
Hence, the correct answer is 'All of these'.