Given the task definition and input, reply with output. 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 clean a ferret's teeth [title] Get a small toothbrush and pet toothpaste. [step] Your local pet supply store will carry toothbrushes designed for kittens and puppies that are small enough for a ferret. It'll also have pet toothpaste, which is safe for a pet to swallow. <sep> (A) [title] Create a cleaning solution of hot water and a nonbleach soap. [step] Begin by adding one tablespoon of dish-washing soap to four tablespoons of warm water. (B) [substeps] Most ferret toothbrushes have an attachment that latches onto the inside of the toothbrush. These can be easily cleaned by gently rubbing the brush over the bristles. (C) Never use human toothpaste to brush a pet's teeth. [substeps] Human toothpaste contains too much fluoride to be safe for ferrets. (D) It should be special for your ferret. [substeps] You might want to consider investing in a small toothbrush.
C