Please choose the correct ending to complete the given sentence: Health: [header] How to make edible slime [title] Combine the sweetened condensed milk, sugar, and cornstarch. [step] Open a 14 ounce (396 g) can of sweetened condensed milk and spoon it into a small saucepan. Stir in 1 tablespoon (12 g) of cornstarch and 2 tablespoons (25 g) of sugar.

Ending1: Bring the mixture to a boil over medium heat. [substeps] Cornstarch paste itself will not completely dissolve when mixed with the cornstarch in the above step. Ending2: Turn the heat on the stove and stir it into the sweetened condensed milk mixture. [substeps] Be careful not to overload the pan because the mixture might burn and you don't want the slime to burn on the stove. Ending3: [title] Stir and cook the slime for 10 to 15 minutes. [step] Turn the burner to medium-high and stir the slime constantly as it cooks. Ending4: Whisk the mixture until all of the ingredients are evenly distributed. [substeps] If you'd prefer to use a different sweetener than the active ingredient, use corn syrup instead.

Answer format: ending1/ending2/ending3/ending4