Fiona followed these steps for a scientific investigation: 1. Collect baking soda and vinegar 2. Pour baking soda into a bowl. 3. Pour vinegar into the bowl. 4. Record observations Choose the statement which shows what Fiona is most likely investigating. This mixture will cause a physical and chemical change to the bowl. Mixing baking soda and vinegar will cause a physical and chemical change. Combining baking soda and vinegar will cause a chemical change. Combining baking soda and vinegar will cause a physical change.​