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

How to do a butterfly kick
Face the direction you want your kick to land.
The butterfly kick is a rotating movement, so during the kick your head will be facing the opposite direction from your legs.
Work out which direction you want your kick to land and then begin by facing that direction.

Select from the following.
a). Do shin-nikes in a standing position, but also face your legs up. Step one foot to the right, bringing your left leg in front of your right leg..
b). This way you can keep your upper body level and perform the kick with your legs straight behind you, rather than slouching or tilting your head to one side. Make sure you have enough room for the kick..
c). Also work out if you want to travel from left to right, or right to left. In the explanation that follows, we will be traveling from right to left..
d). As you do this, you will want to stay calm. This will help you bring your body to the butterfly kick while protecting your body..
c).