What is the key characteristic that distinguishes the period of prehistory from history?

The use of metal tools instead of stone

The existence of large, organized cities

The development of agriculture and farming

How does the primary evidence studied by an archaeologist differ from that studied by a historian?

Archaeologists study written documents, while historians study physical objects.

Archaeologists study physical objects, while historians study written documents.

Archaeologists focus only on prehistory, while historians focus only on recent events.

Historians dig for evidence, while archaeologists read ancient languages.