Select from options: Continue writing the next sentence.

How to make invisible ink with baking soda
Mix baking soda and water.
Making a solution suitable for invisible ink will take almost equal parts baking soda and water. For the best results, you want to mix as much baking soda as you can into a small bowl of water.

OPTIONS: (a). Mix enough water and the baking soda to form a thick paste, which you then apply to your mask. If you don't have a specialty baking soda treatment, there are many other homemade treatments available, including a paste made from baking soda and water. (b). Mix this solution thoroughly with your hands or a scrubber or a brush until well combined. Your baking soda solution should be thick enough for making invisible ink, but not thick enough to fill a cylinder like container with paint. (c). Add a little baking soda at a time and mix slowly to fully saturate the water. 1/4 cup (60 ml) of water will hold 3 tablespoons (43.2 grams) of baking soda. (d). The baking soda and water mixture should create a thick film of tiny granules that seal together like bombs. To wash out this " bomb " with bleach, dump the container into the sink and pour enough baking soda into it to completely submerge the object.
Answer:
(c).