Write the next sentence in the following story.

How to prevent avocados from browning
Look for avocados that are semi-soft in the store.
They will be able to be cut open and used that day. If you're planning not to use them right away buy firmer avocados and let them sit on your counter for a few days to ripen up.

Possible answers: 1. Note that they may not ripen up after two days, leaving them with a cloudy white color. Find the avocados with a bit of metallic grain.; 2. If you're trying to produce avocados anyway, you'll likely need to purchase firmer avocados. Avoid picking avocados that have a sour taste.; 3. If they are ripening too quickly, refrigerate them. Slice your avocado length-wise, once you're ready to use it.; 4. Wash and dry your avocados. Put on gloves and scrub the inside of the avocados with a vegetable brush or vegetable peeler.;. The answer should be
3.