Single/multi-choice problem: Which of the following solutions is better for the following goal:
To make a clear filling for key lime pie

OPTIONS:
* Mix 4 tablespoons of unflavored gelatin half a cup of water and let it sit 20 minutes. Dissolve 2 cups of sugar in 4.5 cups of water and over heat. Remove from the heat, and add the gelatin in water and the key lime extract and mix.;
* Mix 4 tablespoons of unflavored gelatin half a cup of water and let it sit 20 minutes. Dissolve 2 cups of sugar in 4.5 cups of water and over heat. Turn up the heat, and add the gelatin in water and the key lime extract and mix.;
Mix 4 tablespoons of unflavored gelatin half a cup of water and let it sit 20 minutes. Dissolve 2 cups of sugar in 4.5 cups of water and over heat. Remove from the heat, and add the gelatin in water and the key lime extract and mix.