Final answer:
Historians study prehistoric sub-Saharan Africa using artifacts, oral traditions, and languages, but not written records.
Step-by-step explanation:
The answer is written records. Historians study prehistoric sub-Saharan Africa using various methods. These include analyzing artifacts such as tools, pottery, and cave paintings, which provide insights into the culture and daily life of ancient societies. They also rely on oral traditions, which are stories and histories passed down through generations. Additionally, historians study the languages spoken by prehistoric Africans, which can provide clues about their migration patterns and cultural connections. However, written records are not available for prehistoric sub-Saharan Africa, as writing systems were developed much later in history. Therefore, written records cannot be utilized as a method of studying this time period in Africa.
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