Write the next sentence in the following story.

How to protect pets from urban dangers
Secure your home.
As the primary habitat of your pet, your home needs to be pet-proofed. This is especially important in urban areas, since your pet will be spending a lot more time in your home.

Select from the following.
(a). Fencing pets in yards, on couches and tables, or underneath stacked furniture can increase the risk of a dog walking in the neighborhood. In larger urban areas, talk to landlord or homeowner association to see if they can arrange for a fire extinguisher..
(b). When securing your home, consider : Installing a security system. Making sure windows and doors close and lock properly..
(c). Your home should also, for some pets, be to be aquarized to protect them from predators (including lions) and other pests (including fleas). Make sure your home has at least one tank or curtain rod for this purpose..
(d). Enclosures should always be secured with duct tape or sticky materials, which you are then stuck with. Make sure your home is free of pet damage, and consider installing a bird-resistant door mat, similar to the one a squirrel must face... The answer should be
(b).