Write the next sentence in the following story.

How to teach a rabbit not to chew furniture
Provide plenty of fresh grass or hay.
Rabbits need to chew on grass or hay every day to keep their teeth worn down and to get the nutrients they need to thrive. Ensuring that your rabbit always has a supply of fresh, growing grass or good quality hay will reduce the chances that she will chew on your furniture.

Available options:
a). You should also provide fresh hay so that your rabbit eats often, which will help keep her teeth down. Give your rabbit options to chew on that will make chewing on the moving material the easiest.
b). This will reduce your rabbit's chewing habits and also help ensure that she can't break pieces of furniture. Purchase a cage or two and get your rabbit used to eating something she can sip water from while running around in the cage.
c). Timothy hay is a great choice and you can find it in pet stores. Give your rabbit some pellets.
d). Make sure to keep the hay in a clean cage that is free of carbon-dioxide and allergens. Do not feed a rabbit grass that is not hay.. The answer should be
c).