Which of the Following Is the Best Advice to Make

Which of the following is the best advice to make a positive first impression in a phone conversation with an employer?

A) Don't refer to your résumé or references during the first phone call because these references are appropriate only in the placement interview.
B) Take notes about the conversation immediately after hanging up to avoid forgetting details.
C) In the first phone call, be polite and enthusiastic; but don't be pushy by discussing your qualifications.
D) If caught off guard by the call, ask whether you can call back in a few minutes.