All of the Following Are Good Techniques for Job Interviewing

All of the following are good techniques for job interviewing except which one?

A) practice beforehand answering questions that might be asked of you during the interview
B) dress flamboyantly because you will be going into show business and you want to make a flashy first impression
C) maintain good eye contact throughout the interview
D) send a letter after the interview to thank the interviewer for talking with you and considering you for the position