Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make hardtack [title] Preheat oven to 375 ° f. [step] ( 190 ° c. ) [title] Mix flour and water together in a bowl.

Ending1: [title] Arrange powdered sugar into a mixing bowl and beat with a fork or mini whisk. [title] Add the oats and grind them evenly. Ending2: [step] Place the water in the bowl, and slowly add in flour while stirring constantly, until the mixture becomes too thick to stir, at which point enough flour has been added. [title] Knead dough and roll out until it is 1/2 " (1 cm. Ending3: [title] Warm a teaspoon of butter in a frying pan or saucepan over medium-high heat. [title] Spread the rolled up dough on lightly greased pan. Ending4: [title] Wash the hard tack under running water. [title] Sift flour onto a clean work surface.

Answer format: ending1/ending2/ending3/ending4