Write the next sentence in this paragraph:

How to clean gunk from your dog's eyes
Visit your vet.
If your dog has gunk or discharge draining from her eyes, you first need to make sure it's not a sign of a serious health problem. Make an appointment with your veterinarian to determine the cause of the discharge before addressing the problem on your own.

pick from the following.
a). You can make a appointment with your veterinarian either by calling your local animal shelter and asking for advice on how to care for your dog and avoid potentially dangerous contact with gunk. Open a clean dog shampoo bottle.
b). Your vet can then give you a prescription. Get a prescription for antibiotic sprays and dish soap and follow their directions for proper application.
c). While you should evaluate your dog for symptoms, you should never rely on your own assessment of the problem. Take notes on your dog's symptoms and bring them with you to the vet visit.
d). If you visit your veterinarian, you may have them run blood tests on a bag and for eye fluids to measure. Use tweezers to test for gunk.
c).