This type of data is collected directly from people involved.

• A. Secondary research
• B. Tertiary data
• C. Quaternary data
• D. Primary research

Answer: (D)

Collecting data directly from the people involved is primary research. This means you’re gathering new, firsthand information from participants through methods like surveys, interviews, focus groups, or direct observations. Because the data hasn’t been seen or analyzed before, it provides fresh insights specific to your study.

Secondary research, by contrast, uses data that someone else collected for another purpose, such as existing studies or official records. Tertiary data are compilations and summaries of those primary and secondary sources, like review articles. There isn’t a standard category called quaternary data in this context, so it doesn’t apply.