Salma studies historical data published by the United States Census Bureau to determine if there has been an increase in the population of African Americans over the last decade. This study is an example of a(n) . naturalistic observation psychobiography field experiment archival research

This study is an example of archival research.

Explanation:

Archival research is a type of investigation in which archives, such as manuscripts, records and other types of materials are used as the primary source of information.

In this case, we can see that Salma is carrying out this type of study because is focusing on the study of data published by the United States Census Bureau (records) as her primary source of information.

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