What Is One Potential Shortcoming of Using Interviews and Questionnaires

What is one potential shortcoming of using interviews and questionnaires in developmental research?

A) Responses often change if the interview or questionnaire is re-administered to the same set of participants.
B) Only a small amount of useful information is typically obtained.
C) Responses may be inaccurate because participants provide socially desirable responses.
D) Both interviews and questionnaires are time consuming to administer.