The best response to the question about the sampling method used by the waterpark owners is:
C. No, many area kids may not come to the water park, they need a random sample of area kids.
This response highlights the concern that the survey only captures the opinions of kids who are already visiting the waterpark on a specific day, rather than providing a representative sample of all children in the area. Many children may not visit the park at all, which could lead to biased results. A more effective approach would be to gather opinions from a broader, random sample of children in the community.