Which of the following is a disadvantage of questionnaires?

A) They are more expensive than interviews.
B) They do not allow the respondent to be completely anonymous.
C) They cannot be administered in person to groups or individuals.
D) They require the respondents to read and understand the questions.

Questionnaires

A research instrument consisting of a series of questions designed to gather information from respondents about various topics.

Anonymous

A state where an individual's identity is unknown or not disclosed, often used to protect privacy or encourage honest responses.

Administered

The process by which a test, medication, or procedure is given or applied to a participant or patient in a controlled manner.