The correct answer is D) avoid negative terms.
A questionnaire item, distributed to a random sample of adults, reading “Are you not in support of nationalized health care”, with a yes or no possible response, would violate the concept of avoiding negative terms.
When making a survey there are different types of questions that can invite the respondent to answer to get the information needed. There are direct questions, open-ended questions, or double-barred questions. The important thing to get appropriate results is not to bias the question because it encourages people to respond to the question in a particular way. In the case of yes or no questions, it would violate the concept of avoiding negative terms.
The other options of the question were A) avoid double-barreled questions, B) avoid leading the respondent, C) avoid meaningful questions and E) respondents should be competent to answer.