Which of the following sentences correctly uses parallel structure? Option 1: Sienna wanted to bake a cake, so she preheated the oven, measured her ingredients, combined the ingredients according to the recipe, and baked it for 30 minutes. Option 2: Sienna wanted to bake a cake, so she preheated the oven, measuring her ingredients, combined the ingredients according to the recipe, and baking it for 30 minutes. Option 3: sienna Wanted to bake a cake, so she preheated the oven, measuring the ingredients is important, combines the ingredients according to the recipe, and baked it for 30 minutes. Option 4: Sienna wanted to bake a cake, so she preheats the oven, measured her ingredients, combines the ingredients according to the recipe, and baked it for 30 minutes.