What happens next in this paragraph?

How to make naan bread
Pour the milk into a saucepan.
Warm it over low heat. When lukewarm, transfer it to a bowl.
Options are:
a). Saucepan : Cover with half a lid or plastic wrap and bring to the boil. Check on the temperature of the milk until it reaches 140 f (49 c).;
b). This allows it to boil while resting your fingers as opposed to being rubbed, which causes painful calluses and scarring. Mash a handful of a finely chopped garlic and a bit of milk.;
c). Crumble the yeast into the bowl of milk. Add 1 teaspoon of sugar and stir well to combine.;
d). The milk in your saucepan should be hot enough to make the bread sticking up. Take the lid on the saucepan and let the milk sit.;
c).