Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make a tuna egg omelet [title] Preheat your pan. [step] Use a frying pan or skillet and add about 1 tbsp of cooking oil to it. Warm it over medium heat.

Ending1: [substeps] If the pan is too hot at the gas stove, use more oil or a less hot pan. [title] Add 1 tbsp of tuna to the pan and stir it. Ending2: [substeps] The oil should thicken up and spread while you stir it into the pan. Avoid stirring or heating it too frequently or it may not stick properly to the pan. Ending3: [title] Cut the tuna into pieces before heating. [step] Use a serrated knife to cut each piece into quarters. Ending4: Don't let your pan get so hot that the oil begins to smoke. Once the oil is shimmering and covers the surface of the pan it's ready.

Answer format: ending1/ending2/ending3/ending4