Ais a document sent with your résumé to provide additional information on your skills and experience. it provides detailed information on why you are qualified for the job you are applying for and explains your relevant skills or experiences.
a. job application
b. cover letter
c. references
d career goal

cover letter ( B )

Explanation:

A cover letter is a letter that provides detailed information on the skills and experience of an applicant in relation to the job been applied for by the applicant. a cover letter should be detailed and written in relation to the specific job been applied for,

A brief and concise cover letter speaks volumes about skills and experiences better than a general resume been sent for an application. most employers are more interested in the details of where and when you acquired your skills and experience and these information can be found clearly on a well written cover letter other than a regular resume.

cover letter are very vital to the success of a job application.

the assumption the narrator makes in this excerpt is that the messages he heards were going to hurt the narrator's mom; the narrator just springs in to action. the narrator doesn't specify in this excerpt why he believes that the messages present a problem that requires protection.