To answer this question, we need to consider the information given. It takes twenty minutes to hard-boil one goose egg.
If we want to hard-boil four goose eggs, we can assume that each egg takes the same amount of time to cook.
Therefore, to hard-boil four goose eggs, it will still take twenty minutes.
Option A) 40 - This option is incorrect because it assumes that each egg takes 10 minutes to cook, which is not stated in the question.
Option B) 0 - This option is incorrect because it assumes that no time is required to hard-boil the eggs, which is not realistic.
Option C) 20 - This option is correct because it aligns with the information given in the question.
Option D) 80 - This option is incorrect because it assumes that each egg takes 20 minutes to cook, which is not stated in the question.
The correct answer is C) 20. This option is correct because it aligns with the information given in the question.