When Asking Questionnaire Items, a Survey Interviewer Should

When asking questionnaire items, a survey interviewer should

A) ask all the easy questions first, skipping questions that the respondent is slow to answer and then return to difficult questions later.
B) summarize and reword what respondent says in response to an open-ended question, so that it is a more meaningful answer.
C) react with a verbal response e.g., Yes, Oh no! That's a good answer) after the respondent answers a question to show interest.
D) ask each question for the respondent, even if it seems that the respondent has been asked about the topic already.