Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to blow up a balloon with baking soda and vinegar [title] Pour a little vinegar into a plastic bottle. [step] Choose a plastic water bottle, or another bottle with a narrow neck. Pour 1-2 inches (2.5-5 cm) of vinegar into the bottle, using a funnel if you have one.

Ending1: Use white vinegar, also called distilled vinegar, for the best result. [substeps] You can try this with any kind of vinegar, but the inflation might take longer or require more vinegar to work. Ending2: For convenience, you can use a wooden stick or a small bowl to pour the vinegar in. This will keep the bottle from flying away as you blow. Ending3: The vinegar helps to ensure proper airflow so that you can actually blow air through the balloon while holding it up in the air. [title] Shake the bottle to incorporate the vinegar. Ending4: A standard liter of vinegar is 8 ounces. If you are using a smaller bottle, use 12 ounces.

Answer format: ending1/ending2/ending3/ending4