This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to strengthen teeth and gums
Choose the right toothbrush.
Selecting a toothbrush from a store can be overwhelming; the variety of special features, let alone colors, is enough to leave you scratching your head in the dental care aisle. Picking a brush that is right for you is more important than buying the most expensive brush with the most features.

Options are: a). Select a brush made specifically for your needs and style. The type of brush will depend on your particular taste and exfoliating habits. b). The bristles should be at least twice the length of your index and middle fingers. Brush out your gums using the gentle brush technique for children. c). You can go for the classic tooth brush, also known as the coconut brush, or you can try a modern variety of brush. Such brushes have tines that pass the bristles from the back of your tongue to the top of your teeth. d). Things to look for in a toothbrush include : An appropriate size. Larger toothbrushes can be more difficult to maneuver in your mouth.
The answer is:
d).