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

How to feed eggshells to chickens
Collect any eggshells you have.
Don't waste your eggs to get the shells. Collect the egg shells after your done using the eggs up such as when you crack the egg to cook it.

OPT:
1). You should get at least a dozen, or around nine eggs each. It's up to you if you want to save the eggs from the wild, and if you want them to be humanely preserved.;
2). Rinse and then keep the shells in a small container. Spread the egg shells on a tray.;
3). It is best to collect the shells when you cook them as you will not be feeding the chickens later on. If you remove the egg shells once, you should be able to feed them again later.;
4). If you choose to use eggshells, have them cleaned before you can eat them. Getting shells as a reminder can help you to know what eggs were cooked before you use them and make sure they are safe for the chickens.;
The answer is:
2).