Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to build an edible model of a dna strand [title] Cut a single large strawberry into 8 smaller pieces. [step] Cut in any which way you chose as long as they are big enough to stick through toothpick. [title] Cut 4 grapes into halves.

Ending1: [step] This is the opening of the dna strand. [title] Cut 9 canola oil seeds in two. Ending2: [step] Crush up any fruits by smashing them with a fork. [title] Position each fruit in a small shaped dish for serving. Ending3: [substeps] Key note: by cutting the strawberry into eighths and four grapes in half, you will have double the amount of food needed. This is to your benefit, in case any problems occur in building the model. Ending4: [step] Although the halves don't have to be big, make sure that they are small enough to stick through the knife. [title] Cut another large strawberry into 4 as well.

Answer format: ending1/ending2/ending3/ending4