Which type of information does secondary research rely on?

• A. New, firsthand data.
• B. Data collected via experiments.
• C. Primary sources.
• D. Existing information from sources like books, articles, and websites.

Answer: (D)

Secondary research uses information that already exists. It pulls together and interprets data that others have collected and published, like books, articles, reports, and information on websites. This means you’re examining, comparing, and summarizing what already exists rather than gathering new data yourself.

New, firsthand data is produced by you or someone else collecting data directly through experiments, surveys, or observations, which is why that description wouldn’t fit secondary research. Data collected via experiments describes primary research, where you generate new evidence. Primary sources are original materials, not already analyzed ones, so they aren’t what secondary research relies on.