Write the next sentence in the following story.

How to make a rustic bread
Assemble all of your ingredients, which are enough to make 4 or 5 loaves of rustic bread.
If you want the bread to have the traditional, crunchy crust, buy 1 or 2 unglazed quarry tiles to bake it on. The ceramic absorbs the moisture, creating a crunchy crust.

a. It also allows the bread to be easy to peel off once baked. You don't need any cement in the outer shell.. b. You can buy unglazed quarry tiles at a carpet or tile store. Before using, rinse with cold water to remove the dust and place on a flat surface to dry.. c. Soak any unglazed quarry tiles you own in water or use them on bread. If you prefer, you can also substitute fresh bird seed for the natural sunflower seeds and finely chopped walnuts.. d. Quarry tiles are also great because you can convert them into bread loaves. Or, if you don't have any quarry tiles, buy stone at the hardware store... The answer should be
b.