Complete the following sentence: 'Without lactose, gluten or wheat, which means that there are also ____________.' A. structured questionnaire, c...

Complete the following sentence: 'Without lactose, gluten or wheat, which means that there are also ____________.'


A. structured questionnaire, closed questions, yes or no questions, multiple choice questions.
B. open-ended questionnaire, open questions, essay questions, oral questions.
C. quantitative research, qualitative research, mixed research, action research.
D. primary data, secondary data, tertiary data, quaternary data.