If you were to analyze data from written police records from 2000 until 2010, you would be engaging in what type of research?

A) experimental research
B) survey research
C) observational research
D) archival research

Archival research involves analyzing data that already exists in the form of documents, records, or archives, such as police records from a specific time period. Experimental research involves manipulating variables to observe their effects, survey research involves collecting data through surveys or questionnaires, and observational research involves observing and recording behavior without manipulation of variables.