Final answer:
To find out how many cups of water are needed for 18 cups of sugar, we can use the same ratio as in the previous question. If 9 cups of sugar require 18 cups of water, then 1 cup of sugar requires 2 cups of water. Therefore, 18 cups of sugar would require 36 cups of water.
Step-by-step explanation:
To find out how many cups of water are needed for 18 cups of sugar, we can use the same ratio as in the previous question. If 9 cups of sugar require 18 cups of water, then 1 cup of sugar requires 2 cups of water. Therefore, 18 cups of sugar would require 2 x 18 = 36 cups of water. Therefore, the correct answer is A) 36 cups of water.