Which of the following best describes a structured questionnaire?
A) A questionnaire with open-ended questions designed to gather detailed, qualitative responses.
B) A questionnaire that uses a fixed set of questions and response options to ensure consistency and comparability of data.
C) A questionnaire that allows respondents to provide feedback on various topics without any predefined questions.
D) A questionnaire that adapts its questions based on the respondent’s answers, allowing for a more personalized approach.