In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Q: [header] How to prepare for customer service jobs [title] Obtain certification in customer service. [substeps] Many technical and community colleges offer certification programs for customer service. The training involved to achieve certification usually involves a few brief classroom seminars on assessing customer needs and providing assistance, followed by a written exam. <sep> (A) Certification is not required to prepare for a customer service job, but since the field is becoming increasingly competitive it is a way to set yourself apart from other applicants. Certification will also help you gain understanding of how to succeed in customer service. (B) You might also seek training in customer communication by attending lectures on customer feedback. Attending seminars on customer service typically involve teaching from trained employees. (C) It can take between four and 15 years to complete certification. You'll need to get at least a bachelor's degree in another field such as engineering or nursing, or even a two-year degree in business administration (mtms) or communications. (D) As a certified contractor, you need to be proficient in customer service. This means demonstrating expertise in the following fields : [substeps] Customer service customer assistance customer management [title] Locate job openings.
A:
A