Multiple Choice (20 points each，100 points in total.)4. Which of the following is the most effective opening sentence for a cover letter responding to an advertised job opening?
选项：

A:
A: I would like to apply for the position of computer programmer.;
B:
B: Could your company use a computer programmer with exceptional coding skills?;
C:
C: The October 19 issue of the San Francisco Chronicle indicated that your company is looking for an experienced and talented computer programmer.;
D:
D: Please consider this letter an application for the position of computer programmer.