Charles darwin is well known for developing the theory of evolution based on his observations of the finches found on the galapagos islands. which of these would be an example of how someone would explain why the finches had different beak sizes prior to the ideas developed by darwin? a) the differences in their dna led to different beak sizes. b) the finches have always had different beak sizes and that has never changed throughout time. c) the finches continue to slowly change today based on the slight differences found within the population. d) the variations within the finch population led to certain individuals being better fit to survive in different conditions.