The answer is 'by not fulfilling expectations'. The other options don't really surprise the reader, and if the plot is going into one direction, and then what you'd expect to happen doesn't actually happen, you are surprised, and the element of irony is achieved.
Answer:
A good cover letter puts your résumé in context and persuades the prospective employer that you are a good match for the position in question. If your cover letter does its job, the prospective employer will begin to consider your candidacy and go on to review your résumé in detail.
Explanation:
