3. A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporter's data is valid or not? A. The data is valid for the entire city because the bird refuge is located in the city.

B. The data is not valid for the entire city because people can have more than one hobby.

C. The data is not valid for the entire city because bird watchers
are more likely to visit a bird refuge.

D. The data is valid for the entire city because a bird refuge is a good place to find people who like to watch birds.