Multi-choice problem: Continue writing the next sentence in this paragraph:

How to prevent diseases in chickens
Clean your chicken's coop.
Every month, you should remove bedding and nesting straw or shavings and replace them with new, fresh material. Every six months, you should bleach and clean their feeders, waterers, and the entire coop.

Select from: (A). Cleaning the coop, feeders, and bedding material prevents mold, parasites, and ammonia from building up. It will prevent a variety of diseases, such as fungus in the chicken's feet and parasitic infections. (B). If your chickens intend to become house animals, you may wish to replace each of their beds with a shelf. You can also clean all the bedding and wheels in the coop to ensure easy access for the chicken. (C). Use a bunchy oil mask and warm water if you have one to help remove germs and make your chicken more comfortable. Ideally, you do not need to use petroleum jelly on all of the junk at this time. (D). When you're done, seal and sanitize the stock, including the nesting boxes, water troughs, and feeders to prevent disease from occurring. At minimum, you should clean each coop for 10 days.
(A).