Multi-select problem: How does the next paragraph end?

How to care for a fancy rat
Getting a cage for your rat :
Getting a cage is the first essential part in keeping a pet rat. Get a cage that is big enough for your rat to walk around a lot, generally its recommended to have at least 2 square ft per rat , 2.5 square ft or more is even better. Wire floors in a cage could be hazardous.

Options are:
(i) Use a plastic floor much thicker than wire because soft padding may fall in and/or damage your rat's feet. Get boards that separate from the bottom of the cage.
(ii) Make sure to thoroughly monitor the rat before bringing it home so that all its safety is preserved. Don't have a wire floor.
(iii) Rats can climb on walls or dig into a net. Rats also could fall over! ! ! ! Proper air ventilation : Air filters are to be avoided if they get dirty.
(iv) Your rat can get his/her feet caught in a wire floor. Your cage is not your rats only home.
(iv)