During the Interview,how Can You Show the Interviewer You Are

During the interview,how can you show the interviewer you are competent and have confidence in your interview style?

A) Give an impression of poise,good manners,and good judgement
B) Start the interview by asking several questions about the organization
C) End the interview by asking how you can improve your responses before the next step
D) Review a list of potential interview questions and have two-minute responses prepared
E) Avoid shaking hands unless the interviewer offers to do so first