The approach which allows the decisions of various eras to result in a long-lasting impact on the present scenario is the historical research approach.
<h3>What is meant by research?</h3>
Research is the process to find out information and knowledge about any topic or concept from every possible source.
Historical research is a qualitative approach that focuses on identifying the events that happened in ancient times and interpreting the facts and reasons for their occurrence. This study helps in analyzing the impacts of past events on the current scenario.
Therefore, the historical research approach is the one that allows us to study the impacts of different eras on the present lives.
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Answer:
East African trade had many effects on different cultural groups. East African trade created an entire new language when the Bantu-speaking people and the Arabs started interacting with one another. East African trade also introduced Islam to the east coast of Africa.
I believe it would be A. and C.
Hope it helps.