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 deal with fleas and ticks with newborn kittens [title] Use a flea comb. [step] This is the safest and most efficient way to remove fleas from your kitten. You can buy a flea comb at your local pet store. <sep> (A) Avoid using a brush on a flea comb as it will scratch you, and you will not be able to remove any fleas within six weeks. [substeps] For a smaller kitten, this is the size of a paperclip and is recommended. (B) Always comb out your kitten in a warm room so she does not get a chill or develop a cold, which could be fatal to a kitten. [substeps] Put warm water in a bowl with a few drops of liquid detergent. (C) It is a relatively cheap thing to use and it's quick. However, the comb will not remove fleas without the full benefit of quick treatment. (D) Instead of an actual flea comb, you can use a self-starter brush that provides you with a mild flea spray. [substeps] Add the flea comb to the right fill size.
Output:
B