Q: 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 stop sinus headaches [title] Take sudafed. [step] If you cannot see your doctor immediately, you can take sudafed pe sinus headache, which comes in 325 mg/5 mg caplets. These can be bought over-the counter. <sep> (A) Each injector has 15 caplets. If you do not have a doctor's prescription, buy the sudafed version. (B) ( if you cannot see your doctor first, chiramivasana is the most common brand. ) [substeps] These can gradually work the way that sudafed is supposed to work, so carefully make sure to get your family doctor's approval. (C) Do not take sudafed to relieve your symptoms. If taking the medication, choose a safe dose and continue having your doctor administer the solution to your sinus pains. (D) [substeps] They contain acetaminophen which helps to relieve pain. They also contain phenylephrine hydrochloride which relieves congestion in the nose by shrinking the blood vessels.
A:
D