Answer:
A) a research database.
Step-by-step explanation:
A search database is a place where you can store survey data in a structured manner and with the least possible redundancy. These data should be able to be used by different users who are seeking relevant information about the methodology that was used in a research and the results achieved by this methodology.
Based on this, if Tracy wants to find out what coefficient of friction she should apply to her laboratory data, she should look in the search databases for which coefficient of friction was used in research data similar to her research.