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".
Q: [header] How to care for a child with croup [title] Keep your child calm. [step] It can be frustrating or even frightening when your airway is slightly obstructed by swelling, and children may become very upset. It's important that you try to keep them calm, as getting too agitated can make breathing problems worse. <sep> (A) [substeps] Speak in a soothing voice and make sure your child does not see you get visibly upset about their breathing. If your child's breathing becomes too labored, seek immediate medical attention. (B) [substeps] Try to keep your child's mouth open when your child is vomiting. When you are doing this, keep the child upright and ensure that their mouth is open. (C) Try: exercising, taking a nap, and listening to music when they need it. Reassure them that everything is fine and you will not get sick. (D) [substeps] Try soothing thoughts like, " everything is going to be okay. " or, " it is your baby, everything is going to be fine.
A:
A