Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make peanut butter banana bread [title] Preheat the oven and grease the pan. [step] To ensure that the oven is hot enough to bake the bread, set the temperature to 350 degrees fahrenheit (177 degrees celsius) and allow it to heat fully. Next, grease a 9-inch by 5-inch (23-cm by 13-cm) loaf pan with nonstick cooking spray and set aside.

Ending1: [title] Preheat the oven to 350 degrees fahrenheit (177 degrees celsius). [step] Spray the pan lightly with nonstick cooking spray and set aside. Ending2: [substeps] You can substitute peanut butter or butter for the peanut butter. You can also make peanut butter banana bread using traditional peanut butter or go for the walnut filling instead. Ending3: [substeps] The greased pan will come with an enclosed bottom pan for each banana. Each banana will help enhance the bread's flavor and texture. Ending4: [substeps] Keep an eye on your oven so you know when it's reached the right temperature. It will likely make a beeping sound and/or flash an indicator light.

Answer format: ending1/ending2/ending3/ending4