The answer is B.
A fossil record is the record of the occurrence and evolution of living things via geological time as concluded from fossils. Through the study of fossils, scientists learn about various organisms and how they have changed throughout history that serves as the best proof of evolution.
Most importantly, some evidence shows that some species had the same ancestor despite growing far apart due to different environmental factors that made them lose some common features. This is considered to be true of human beings and apes. Therefore, the fossil record provides evidence of a common ancestor to many species – choice B.