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 deal with severe motion sickness in dogs [title] Use sedatives to calm your dog on long car rides. [step] These medications work by interrupting your dog's stress and pain response between the brain and nervous system. They reduce stress and relax your dog for several hours. <sep> (A) Make sure your dog is receiving the right medication for his specific needs. [substeps] For example, create a topical beta acid cream and administer it before taking your car ride if your dog is sick. (B) These products may even allow your dog to sleep peacefully. Always consult a veterinarian and get a prescription before giving your dog a sedative. (C) [substeps] Learn how to use sedatives. Usually, you'll be instructed to make an appointment with your veterinarian before taking sedatives. (D) [substeps] Sedatives not only help suppress the neurotransmitters within your dog's brain, it also regulates your dog's heartbeat. [title] Get your dog to avoid rolling forward or backward.
B