Answer:
Explanation:
Sure, the main purpose of a cover letter is to be called for an interview. Usually, recruiters, specially recruiters from the most wanted enterprises, receive many, many resumes or curriculum vitae.
A way to stand out among so many applicants is with the cover letter. By summarizing why you consider yourself a good candidate, why you want to work for the company, how you can contribute with the purposes of the firm, and how seriously you consider the opportunity to work with them, is with a good cover letter.
Of course, you will not be hired for the position because your cover letter was good; that will be a result of the interviews. Thus, option (b) is not correct. The other two options, are clearly out of the purposes of a cover letter, because it is aimed to the firm to which you are applying and not to your friends or others from your network.