Which of the Following Statements Is/are True About Questionnaires?​

Which of the following statements is/are true about questionnaires?​

A) ​Researchers can avoid the need for pretesting if they are very careful in the way they word questions.
B) ​Because it is virtually impossible to avoid some mistakes in wording, questionnaires should be pretested in a dry run.
C) ​When pretesting, the pretest sample should be very large.
D) ​When pretesting your questionnaire, it's better to ask people to read through it looking for errors rather than to complete the questionnaire.