Goal and options: how far in advanced should I slice cake?

OPTIONS:
- Don't "pre-slice" cake more than 20 minutes in advance. It dries out too quickly.
- two days ahead is fine, as long as you keep it tightly wrapped, and stored in the freezer.
output answer: Don't "pre-slice" cake more than 20 minutes in advance. It dries out too quickly.

Goal and options: To get the paint on PVC pipe to harden.

OPTIONS:
- Leave the PVC pipe alone to dry for a week.
- Put multiple layers of paint on the PVC pipe.
output answer: Leave the PVC pipe alone to dry for a week.

Goal and options: how do you heal a sprained ankle?

OPTIONS:
- stay off of it for three weeks.
- don't run on it for three weeks.
output answer:
stay off of it for three weeks.