Answer:
I would be glad to help you if you posted the answer choices but I have this on my test where I got 100%.
Step-by-step explanation:
The answer is C. You want to know how many people in the city watch birds. The reporter's data is not valid because he's only surveyed bird watchers. He's ignored the 90% or so of the people who don't go to the bird refuge.
Please post your answer choices next time!