If there is an option for Vitamin B12 then that will be your answer.
Its A. The adenoids and Tonsils. Adenoids are a patch of tissue thats high in the throat, directly behind the nose. They, along with the tonsils, are parts of the lymphatic system. In simple terms it helps stop infection and keep many body fluids in balance. They basically trap the germs that make their way through the mouth and nose. To add on, when the tonsils become inflamed either by taking too much germs or bacteria, thats what tonsillitis is. Hope this helps
You can socialize at events to gain experience in that area, you can join social media to gain experience(as long as it is a healthy environment) or you can do things with friends.
I believe the answer would be rowing.
Electronic Medical Records
