Write the next sentence in the following story.

How to spoil your pet rabbit
Provide hay.
Rabbits need access to hay 24 hours a day. Hay is great for nesting, and also aids in digestion.

Choose your answer from: [I] Full-fledged rabbits are less likely to roam the cages once they have established their territory. Provide hay in all the underground parts of the cage.. [II] Go to the pet store and pick out a bag of high quality timothy or oat hay. Make sure there's always a few piles of hay present in your rabbit's cage so he can eat and nest as he pleases.. [III] Provide hay 3 days a week, in combination with hay mixed with water. Consider feeding your rabbit hay about every two hours if you live in a hot climate (59 to 70 f).. [IV] Make sure to provide a grassy spot on the ground that is easy for your rabbit to climb up and down. You can purchase hay from a pet store or online... The answer should be
[II]