What happens next in this paragraph?

He first explain how you can use different chemicals and core them down the drain to get the smell out. then he
Choices:
a). shows you how to set each car hosed down with salt..
b). shows you how to remove bottom of the sink to clean it out which may help with the smell..
c). explains how you can use the product and still have some juice in your coffee and the instructions to set aside the waste product is to use them in a lab..
d). makes a drink to hydrate the steam..
b).