Maria wants to know if birds prefer to eat in one place over another. She has three of the same bird feeders and fills them with the same amount of the same birdseed. She puts each of the feeders in her backyard: one feeder in a large dead tree, another feeder on the doghouse, and the last feeder in a small tree. She measures the amount birdseed eaten from each bird feeder after 5 days. What is the dependent variable?

(A) Amount of birdseed eaten
(B) Amount of time feeders are outside
(C) Locations of the bird feeders
(D) Type of bird seed