A market research company surveyed $500$ consumers selected at random from a specific region and found that $60\%$ of them prefer Brand X coffee. Based on this survey, which of the following statements must be true?

I. Exactly $60\%$ of all consumers in the region prefer Brand X coffee.
II. If another random sample of $500$ consumers were surveyed from the same region, exactly $60\%$ would prefer Brand X.
III. If a random sample of $500$ consumers were surveyed from a different region, exactly $60\%$ would prefer Brand X.