Questions 162-164 refer to the following letter. LA Music Academy 370 South Fair Oaks Ave, Pasadena, California 91105 Phone: (626) 568-8150 September 1 Dear colleagues, I am writing to let you know that I have accepted a position as a music director of the Oregon Symphony and will be resigning from my position as a senior lecturer here on September 22. The decision to leave LA Music Academy has been an extremely difficult one, as I have enjoyed teaching at our school tremendously. However, I do feel that it is time for me to move on to the next stage of my musical career. I believe the position at Oregon provides an opportunity for such growth. During my seven years at this academy, I have had the privilege of working with many fine musicians such as yourselves. I am very grateful for your hard work and encouragement and wish you continued success. Best wishes, Phillip Janssen What is the main purpose of this letter
A. To recommend a staff member B. To describe a collaboration C. To announce a resignation D. To state a job description