Answer:
C. Information from research already conducted for another purpose
Step-by-step explanation:
Secondary data is research information that is already available for use by other researchers. It is data that was collected previously for different purposes but is relevant in the current study. Secondary data consists of information collected as part of an organization's or government's routine tasks.
Secondary data contrast primary data, which is collected specifically for the current data. Sources of secondary data include books, libraries, internet searches, and information from government departments.