Select from options: Continue writing the next sentence.

How to keep kids safe when sledding
Determine if the sledding space is safe.
One of the most important things you can do to keep your kids safe is to make sure the hill where they are sledding is safe. The hill shouldn't have any kind of obstacle on it.

OPT: [i] Ensure that the hill is safe in a space with two sleds, which means there should be no obstacles. There should be no stairs on the hill, so the sleds should be hidden from the kids. [ii] Obstacles are dangerous, not fun things for the kids to dodge. Running into trees, fences, boulders, and other things in the sled path is a common way kids get injured. [iii] Consider : Guardrails: the caps might cut into the bottom of the hill or fall off the sides. A large area, especially on icy slopes or on gravel, might be unsafe for sledding. [iv] Unless your child's safety sign goes blue, they shouldn't go sledding on grass and dirt. If the hill is paved, they shouldn't go sledding either.
Answer:
[ii]