This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to store used coffee grounds
Put your grounds on a baking sheet lined with newspaper.
Keep the grounds no more than 2-3 inches (5.1-7.6 cm) thick. This will help you dry your grounds faster and will reduce the chance of them developing mold
Place the baking sheet outside in the sun.

Possible answers:
1). The sun will lighten your grounds but not too much. Refrigerate the entire batch of coffee grounds.
2). Use a timer to indicate how long you want to let the mass of grounds dry before you're ready to store them. Set the timer and let it speed up.
3). Try to find a spot that receives sunlight for most of the day. Coffee grounds are often used as a deterrent for neighborhood pests, so you don't need to worry about critters getting into your grounds.
4). Is generally ideal, but place it outside in the direction that the sun is blowing. If you do not have an umbrella, spray the cover with an olive oil-based primer.
The answer is:
3).