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 tell if a horse needs teeth floated [title] Determine if your horse has difficulty eating. [step] Dental spurs in your horse's mouth may dig into the buccal (cheek) or lingual (tongue) surface and cause pain. This indicates that your horse needs its teeth floated. <sep> (A) They can also cause your horse to spit. [substeps] Your horse may need its mouth rinsed regularly, especially in between meals. (B) In this case, either the horse's vision is blurred or the cinchiccal is damaged. [substeps] If you notice that your horse's tongue is protruding from its mouth, it may also be having trouble eating. (C) Lean horses need to have their cheeks pushed back and their backs straight for better stability when they are transported back and forth between a barn and a horse pen. [substeps] Fixed spurs in a horse's mouth can contribute to discomfort and, if chewed, paralysis. (D) [substeps] The horse may be hesitant to eat or eat less than it usually eats. The horse may take a long time to eat, and throw its head as it eats.
D