Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make sausage gumbo [title] Heat the butter. [step] Add 3 tablespoons (43 g) of unsalted butter to a large dutch oven or pot. Turn the heat to medium, and allow the butter to melt completely, which should take approximately 3 to 5 minutes.

Ending1: [substeps] You can substitute olive oil for the butter in this recipe, but it's still recommended that you use different oils, such as peanut oil, canola oil, and vegetable oil. It can make the gumbo more notably spicy, but it's no substitute for butter. Ending2: [substeps] You should use unsalted butter as opposed to salted butter in your recipe. Kale can be substituted for butter if you prefer your gumbo extra. Ending3: [substeps] If you prefer, you can substitute olive oil or vegetable oil for the butter. [title] Add the sausage and cook for several minutes. Ending4: You can use a candy thermometer to get exactly how long it takes to melt. [substeps] The butter will cause the gumbo to be thick enough to coat the bottom of the pan.

Answer format: ending1/ending2/ending3/ending4