Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make tortilla chips [title] Preheat the oil. [step] Add about 2 cups (470 ml) of oil to a large skillet or frying pan. Heat the oil over medium-high heat for 5-10 minutes, until it reaches 350 f (177 c).

Ending1: [substeps] Use a thermometer to check the temperature. Avoid grilling or frying the chips. Ending2: Stir the chips every 10 minutes for the final minute in the pan. [substeps] If you want your tortilla chips to be even healthier, use melted butter or nonstick cooking spray instead of oil. Ending3: [substeps] If you don't have a thermometer, you can tell the oil is ready when it's shimmering but not smoking. Ideal oils for frying tortilla chips are vegetable and canola. Ending4: [substeps] For the best results, you want to check the temperature of the oil as it preheats. If it doesn't, check again.

Answer format: ending1/ending2/ending3/ending4