Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to bake an angel food cake [title] Separate the eggs before heating the oven, adding the whites to a liquid measuring cup until you have 1 1/2 cups. [step] It will take about 12 large eggs. [title] Preheat the oven to 350ºf/180ºc. [title] Sift the flour before measuring.

Ending1: [step] Sift out the wet eggs and beat them until the bread crumb forms. [title] Scoop 2 1/2 cups of the crumb mixture into the bowl. Ending2: [step] The sifted flour will develop an egg flavor and be easier to pour and to save. [title] Place the bran into the centre of the line in the bowl. Ending3: [step] If you do not have a sifter, use a whisk to fluff the flour before measuring. Add about half the sugar to the flour and sift again. Ending4: [step] Stir the flour into the sugar in a shallow dish. [title] Separate the egg whites from the sugar and dump out the lumps (added or combined).

Answer format: ending1/ending2/ending3/ending4