Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make rum and coke jello shots [title] Boil one cup of coke. [step] Pour one cup of coke into a small saucepan. Bring it to a boil.

Ending1: [title] Combine the eggs, milk, rum, and sugar in a medium saucepan. [step] Add 1 cup of flour and 1/4 teaspoon of salt. Ending2: [substeps] The thickness of the soda will determine how high you create a glass shot. When you've poured the coke in, add the two-ounce (120 ml) bottles. Ending3: Once the coke reaches a rolling boil, reduce the heat to low, cover the pan, and allow the mixture to come to a boil. [substeps] The amount of time you use to prepare your shots is up to you. Ending4: This should only take a few minutes.. [substeps] It is also an option to use diet coke.

Answer format: ending1/ending2/ending3/ending4