Definition: 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".
Input: [header] How to handle winter allergies [title] Minimize your exposure to dust and dust mites. [step] Dust and dust mites are common indoor allergens, so when winter comes (and you spend more time indoors) these allergy symptoms may worsen. The best way to combat the allergy symptoms is to prevent (or minimize) your exposure to the allergen in the first place. <sep> (A) [substeps] Limit exposure to dust products, pesticides, and other indoor allergens. Use windows that are cool and dry or places at least partially shaded. (B) [substeps] This is especially important if it is your first exposure to pollen and dust mites. Pollen mites can make you sneeze and cough, which may make you more susceptible to pollen mites. (C) Strategies to reduce the dust and dust mites in your home include : [substeps] Purchase a hepa air filter. This can help to clear dust out of the air, and hence reduce your allergy symptoms. (D) You can minimize your exposure to dust or dust mites by : [substeps] : blowing your nose, checking your closet, or looking out your windows. Keeping your windows clean and dry if possible.
Output:
C