You will be given a definition of a task first, then some input of the task.
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 rid your horse of mud fever [title] Clean your horse's legs regularly. [step] Look at your horse's legs every day for any signs of irritation or scabbing. If you notice irritated skin or scabs, clean the legs with a good quality soap, like a chlorhexidine scrub preparation. <sep> (A) [substeps] Shower after strenuous physical activity or in the middle of the day as well. If the place used to be your barn, walk around from there to avoid putting foot on the dirt or stepping on the mud. (B) Rub the soap over your horse's legs to keep stains and dirt at bay. [substeps] Get on your horse's right side and lean over their shoulder. (C) Rinse your horse's legs and apply enough of the chlorhexidine to cover the area. Gently wash the legs and rinse off the cleanser. (D) Make sure you clean the animal thoroughly before putting the saddle on. [substeps] Wet the affected area with warm water and washcloth.
Output:
C