Write the next sentence in this paragraph:

How to take in a stray cat
Make sure the cat you've found is a stray for sure.
Take the cat to a vet and ask them if there is a microchip in the cat. The vet will be able to tell if someone owns the cat if a microchip exists.

Available options: a). This will be clearly marked on the animal's body, which can help identify the owner. That's why it's important to have a microchip with you. b). You can also ask someone that you know or that is normally an employee at your company for advice. Take the cat for an annual visit. c). A microchip cannot be implanted in your cat directly or indirectly. You may be able to buy one online and deal with it however you want. d). The vet may also have notices of any missing cats you can check. If the microchip doesn't exist or the owner cannot be traced this way: leave a message on online sites that help people find lost cats.
d).