Please choose the correct ending to complete the given sentence: Work World: [header] How to become an endocrinologist [title] Obtain a bachelor's degree in a science-related major. [step] Though you could choose any major you want, it's best to study something like physiology, biology, or social science. These majors will help you build the prerequisite skills for medical school.

Ending1: [substeps] If you are enjoying high school, they might teach you basic tests or techniques, like how to fight ethylene gas. Foreign nationals don't get their master's degree until they finish medical school. Ending2: [substeps] These degree levels will take some effort on your part, so keep an eye out for whatever college you want to attend. It's not always necessary to go to medical school if you're currently planning on med school. Ending3: [substeps] Enroll in or look for a program at an accredited medical school. Most states require endocrinology courses at high schools and universities. Ending4: In addition to studying science, you should also take courses in math, english, and the humanities. These courses can help prepare you for interacting with patients and writing reports.

Answer format: ending1/ending2/ending3/ending4