Which of the Following Is an Accurate Statement About Self-Report

Which of the following is an accurate statement about self-report questionnaires?

A) In self-report questionnaires, people are always the best sources of information about themselves.
B) Self-report questionnaires are widely used in psychological research as they help in avoiding social desirability bias.
C) Self-report questionnaires are easy to use, especially in the context of collecting data from a large number of people at once.
D) In self-report questionnaires, the answers are often open-ended and not constrained by the researcher.