What happens next in this paragraph?

How to heal mouth sores caused by chemotherapy
Brush your teeth gently after each meal.
The bristles of a toothbrush may aggravate your symptoms, so opt for an extra soft toothbrush. Brush after every meal, and before bedtime.
Choose from: (a). Daily brushing allows the bacteria in your mouth to penetrate and make wounds less prone to infection. Brushing will also help your mouth heal by reducing your risk of gum disease.. (b). Clean your mouth and gums with a soft toothbrush and warm water. Swish the soft toothbrush and water for 8 minutes, and then spit.. (c). Brush your teeth a couple days before the surgery. Never brush for more than 20 minutes at a time, as moving the bristles up and down may be too much.. (d). This will minimize bacteria and reduce oral ulcers. It will also reduce the risk of the ulcers becoming infected..
(d).