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

One adult and two small children work together to put leaves on a yard into a paper bag. one adult

OPT:
I. then sets others around the yard to take down.;
II. sprinkles leaves on top of the bag, then has to put a yellow cape on top of the leaves.;
III. removes the cardboard boxes and tells the children to stand on the camera.;
IV. stands with two children on a lawn amidst many leaves with a black truck in the background.;
IV.