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

How to make cookie dough bark
Prepare a pan and set up a double boiler.
Get out a jelly roll pan and line it with waxed paper. Set the pan aside and get out a medium saucepan.

(a). Fill the saucepan with 4 cups (360 g) of water. Set a large skillet on the stove and turn the heat on medium high.;
(b). Make sure the pan is big enough to hold all the flour. Put the butter, egg, half of the cinnamon sticks and butter into the pan.;
(c). Pour milk or cream and sugar into the saucepan with the melted butter. Bring the milk or cream to a boil over medium heat.;
(d). Pour 1 inch (2.5 cm) of water in the pan and put it on the stove over medium-high heat. Set a clear oven-safe bowl over the saucepan.;
(d).