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

. three young children , 2 girls and a boy ,

Choose from:
(1). are wearing floral colored leotards, and they're using an exercise equipment in a backyard demonstrating how to properly use the exercise machine.;
(2). are playing at a beach and piling sand onto a big pile as waves continue to go in and out.;
(3). bounce on water buoys suspended under the sky of a summer day with boats in the background.;
(4). are inside one of the christmas tree lights.;
(2).