Which of the following is a primary source of data?

The correct answer is C. Survey.

A primary source of data is original information collected directly from the source, without any interpretation or analysis. A survey gathers firsthand responses from individuals, making it a primary source. In contrast, a newspaper may report on surveys, textbooks compile information from various sources, and the internet can provide both primary and secondary data. If you have more questions or need further assistance, feel free to ask!