Multi-choice problem: Continue writing the next sentence in this paragraph:

How to buy a collar for your cat
Evaluate your reasons for getting a collar.
The type of collar you buy will depend greatly on why you want it. Are you looking to provide id for your cat in case it gets lost? Do you want to start walking your indoor cat on a leash? Make sure you understand all your reasons for wanting a collar before you purchase.

Available choices:
a). Watch out for lotions and soaps with a collar on them. Lotions and soaps can contain chemicals that can be harmful to cats if handled incorrectly.
b). You can also consider your cat's age. If you get a collar for a small animal, such as a terrier, talk to your veterinarian about getting a collar for a younger cat.
c). That way, you'll have to set forth all of the reasons you think a collar would be good for your cat. Consider if your cat will need a collar to be able to run freely in your home.
d). If you are looking for a place to hang id tags, a standard collar should suffice. Alternatively, for permanent identification, you may opt to have your cat microchipped.
d).