Question

multiple choice question
the two main forms of the survey are ______.

ethnography and experiments
questionnaires and existing sources
experiments and interviews
interviews and questionnaires
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Explanation:

Surveys are primary data collection tools in research. Ethnography and experiments are distinct research methods, not survey forms. Existing sources are secondary data, not a survey form. The two core direct survey formats are structured questionnaires (written/electronic) and interviews (direct verbal interactions).

Answer:

D. interviews and questionnaires