Final answer:
The correct sentences are B) Prehistory is the period before written records and D) Prehistory refers to recent historical events. A) Prehistory is a written account of events of the past is false. C) Prehistory is well-documented and studied is also false.
Step-by-step explanation:
The correct sentences are B) Prehistory is the period before written records and D) Prehistory refers to recent historical events.
A) Prehistory is a written account of events of the past is false. Prehistory actually refers to the period before written records, so it cannot be a written account of events.
C) Prehistory is well-documented and studied is also false. Since prehistory refers to the time before written records, there is limited documentation available, making it more challenging to study.