Multi-select problem: How does the next paragraph end?

How to smile with braces
Exercise your smile.
The best way to grow comfortable with smiling while wearing braces is to practice. Your facial expressions rely on a series of muscles in your face, so " exercising " your smile in front of a mirror can help you find a smile range that you're comfortable with.

Select from:
a). Stretch the corners of your mouth outward, keeping your lips closed. Hold that pose for 10 seconds, then release it.
b). Learn the ins and outs of smiling. You can find videos online, or meet your doctor and have them show you how to do some basic smiles.
c). Here are some examples of exercises you can try to build up your smile while wearing braces : Smile with your mouth open slowly rise up into a sitting posture. Pull your cheeks down toward your chin and lick your lips.
d). At the same time, try to keep your lips in a neutral position and breathe deeply from your diaphragm, then reward yourself when you get a smile. General exercise will help with that too.
a).