Write the next sentence in the following story.

How to make your guinea pig comfortable in its cage
Consider the size of the cage.
The humane society of the united states has noted that most cages available on the market for guinea pigs are simply too small. In fact, most cages are instead meant to house smaller animals like hamsters and gerbils.

pick from the following.
+Unlike other animals, guineas pigs need floor space, not vertical space. They need ample room to move around and exercise in order to stay healthy.;
+Because guinea pigs do not need to be quarantined, the size of their cage is not important. For example, as a guinea pig ages, it will start building up its digestive system, and may begin looking healthy.;
+Cages made of wire should be at least six inches in diameter. There should be at least one other piece of wire inside of the cage that the guinea pig can chew and wiggle.;
+In order to accommodate a guinea pig as a pet, consider giving your guinea pig all the space it can take up in its cage and eating lots of food. Give your guinea pig food that it enjoys.;. The answer should be
Unlike other animals, guineas pigs need floor space, not vertical space. They need ample room to move around and exercise in order to stay healthy.