Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to ripen plantains [title] Choose the right environment to ripen your plantain. [step] You can ripen plantains in your own kitchen. However, make sure you choose the right place to ripen your fruit.

Ending1: You can open your doors to let cool air in before you ripen, which can make the plantains bitter. You also want to make sure your room is as cool or hot as possible, so you can ripen plantains fresh. Ending2: [substeps] Avoid using a sharp knife to ripen plantains. You should always place them in your fridge as opposed to storage. Ending3: [substeps] Plantains ripen best in a warm and well-ventilated place. If your kitchen is very cold or stuffy, try to find another room in your house to ripen them. Ending4: The sun and humidity are responsible for the plant's ripeness and flavor. You'll also want to place plantains in a place where fresh sun won't damage their flesh.

Answer format: ending1/ending2/ending3/ending4