Which of the following procedures was most likely followed to determine the change in beak size?
- A A few finches were trapped in 1981 and again in 1987, and their beak sizes were compared.
- B The beak size in fifteen finches was measured in 1987, and the beak size in the original finches was determined by estimation.
- C The beak size in a large number of finches was measured every year from 1981 to 1987.
- D Finches were captured and bred in 1981, and the beak size of the offspring was measured.
