Which statement about the giraffes explains their evolution based on charles darwin’s main points? a) the closest fossil ancestor to these giraffes would have a very short neck. b)all three of the giraffes have an equal chance of reproducing regardless of the environment. c)as a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment. d)long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.