Instructions: 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 make your home safer for a senior dog [title] Place area rugs over hard floors. [step] Older dogs can sometimes struggle to get around on hard floors. To reduce your senior dog's risk of falling or struggling to walk around, place some area rugs around the house. <sep> (A) If you have a big family of senior dogs and you are starting a new home, place them along the edges of couches, desks, chairs, tables, and over-the-counter appliances. [substeps] You can also place tupperware in the area rugs to prevent them from sinking or shifting around. (B) This will improve the chances that your dog can navigate your home safely and comfortably. [substeps] You can place a large area rug over a bare floor or just place a few small rugs around. (C) Your dog will lick off some of the rug as it walks, making it less likely that your older dog will knock on it. [substeps] If you decide to place rugs on hard floors, you will need to purchase cotton or canvas rugs for a maximum amount of padding. (D) Place a rug in each room, and carefully trim it down to a safer height before moving on to the next step. [substeps] This also eliminates the need to mark all the rooms in your home, where dogs can escape if they get locked in.
Output:
B