Which statement about surveys is true?

A) Survey anonymity guarantees honest responses.
B) Surveys are a popular qualitative research method.
C) Surveys can generate quick results but are costly.
D) Surveys can include both closed and open-ended questions.

Surveys can include both closed-ended questions, which provide respondents with a set of predefined responses to choose from, and open-ended questions, which allow respondents to provide their own answers in their own words. Surveys may or may not guarantee anonymity, depending on how they are conducted. Surveys are typically considered a quantitative research method, rather than a qualitative one. Surveys can often generate quick results, but the cost of conducting a survey can vary widely depending on factors such as sample size, survey length, and the mode of administration.