Multi-select problem: How does the next paragraph end?

The video then shows the two boys mixing ingredients together. They roll the dough into balls and place them into an oven. the boys

pick from the following.
(a). put cigarettes inside the oven before the timer.
(b). then bake the dough in front of the fireplace.
(c). lay down their oven covers and look around the room.
(d). take the cookies out of the oven and begin eating them.
(d).