If a researcher is using data that are low in cost and save time, the type of data is this likely to be secondary data. The correct option is c.
Data that is gathered by a user other than the main user is referred to as secondary data. Census data, information gathered by government agencies, company records, and data that was initially gathered for other research goals are all common sources of secondary data for social science. This will be low in cost as it is easily available, and it will also save time.
Therefore, the correct option is c. secondary data.
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