Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to make an edible dna model [title] Prep your workspace. [step] Clean and sanitize a table that has enough surface space for you to construct the helix; you do want to be able to eat the dna afterward. Collect the necessary supplies including tooth picks, a bag of candies with 4 different colors, and, if possible, licorice sticks.

Ending1: You'll also need to collect 13 teaspoons of rice in a small storage container. [substeps] If building a helix, you'll likely need several teaspoons of the cleanest water and 8 teaspoons of corn starch. Ending2: [substeps] There are limitless number of food items that can be used to represent the dna, it just need to be color coded and soft enough to put a toothpick through. Colored marshmallows are a popular option, as are gummies. Ending3: [substeps] You will need : 2 lengths of loose string. A book square with a narrow opening for your marzipan later. Ending4: [substeps] Make sure that there is as little candy as possible on your table. Candy knives are acceptable, but don't use.

Answer format: ending1/ending2/ending3/ending4