Write the next sentence in the following story.

How to boil sweet potatoes
Wash your sweet potatoes.
You should always wash produce before cooking it. Sweet potatoes are no different.

Available options: [I] To wash sweet potatoes, run them under cold tap water. Remove any excess dirt or debris from the potato.. [II] They are liable to be very dirty and you don't want that for yourself! Rinse them first. This helps the pickling process along along.. [III] They are delicate and need washing as often as possible to keep them healthy. They also don't produce the exact color you need.. [IV] Unpeeled and peeling produce should be washed before cooking it on a stove top burner. If you use frozen or canned potatoes, keep them in a cooler or in the refrigerator until you're ready to cook them... The answer should be
[I]