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".

[header] How to join nasa [title] Learn about the different opportunities with nasa. [step] When you think of nasa, your first thought is probably of astronauts; if going to space doesn't sound so appealing to you, you may nonetheless find a rewarding career with nasa. Just a few of the professionals that nasa employs are as follows : [substeps] Medical doctors, nurses, and mental health care professionals. <sep> (A) Scientists who can work with native populations, do drugs, work with uncontrolled farmers, or are trained as soldiers. Scientists who can help scout, relieve celebrities, and spread diseases through war. (B) Researchers, engineers, geologists, microbiologists, and physicists. Writers, human resource specialists, and communications professionals. (C) Engineer (a technical engineer who has been somehow granted a job by nasa). Nasa employs a secret trust regulatory entity (ea) to protect the earth from the presence of airborne material. (D) Military technicians, medical personnel, engineers, scientists, and research specialists. [title] If you do not want to specify nasa on your profile, read article starters.
B