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 diagnose vertigo [title] Notice dizziness and feelings of imbalance. [step] Primary symptoms of vertigo include dizziness and a sense of imbalance. If you feel as though you are spinning or your environment is spinning, this suggests vertigo. <sep> (A) Both dizziness and imbalance can be separate; however, each of these symptoms have different negative effects on the person's blood glucose balance, nervous system and/or mood. People who experience vertigo in people with low blood glucose balance and who experience vertigo in people who are higher functioning are at risk of developing vertigo. (B) Feeling as though you are going to fall over or being unable to balance yourself also suggest vertigo. [substeps] These symptoms could be caused by inflammation of the vestibular cranial nerve, so it's important to visit your doctor and get a definitive diagnosis. (C) [substeps] Vertigo may manifest itself in small parts of the body such as the eyes, ears, nose, and mouth. Dizziness can change your focus in all directions as well, so it may be a sign that something is going on. (D) [substeps] Lightheaded people may experience dizziness and am lightheaded, while middle-aged women may experience vertigo and may feel that they are dizzy. Vertigo is frequently described as a symptom of motion sickness.
B