Which of the Following Is the Best Advice for a Cover

Which of the following is the best advice for a cover letter that accompanies a résumé sent via e-mail or by fax?

A) Take the time to prepare a professional cover letter to accompany your résumé sent electronically.
B) Mail the cover letter separately from the résumé sent via fax or e-mail.
C) Shorten your e-mail or fax cover letter to a brief statement such as Please consider the attached résumé for your opening.
D) Skip the cover letter as it is unnecessary to introduce yourself because the fax or e-mail includes your name.