Jasmine wants to do an experiment, and she wants to collect data by observing. She has three birdhouses in her yard, and she decides to use them for the experiment. She puts a different kind of birdseed in each one of the houses. Which question should she try to answer if she wants to collect data by observing? A. How long are the feathers on a blue jay? B. Which type of birdseed do the people on her street buy? C. Which type of birdseed do the birds prefer? D. Which type of birds do her friends like best?