
Passage: Among vertebrate fossils, shark teeth are one of the most common fossils. However, fossils of shark skeletons are very rare. Compared with the discovery of fossilized skeletons of other vertebrates, the discovery of fossils of shark skeletons is better than none at all.
Question: Which of the following options, if true, will most help to solve the confusion in the above?
A. A.The shark's teeth have to be changed many times in a lifetime, but the shark skeleton does not change for the rest of its life and has only one skeleton.
B. B.Compared with the skeletons of teeth or other vertebrates, the cartilage skeletons of sharks are not easily fossilized.
C. C.The process of fossilization of shark skeleton is the same as that of fossilization of shark teeth.
D. D.It is indeed doubtful that fossils of shark teeth cannot be found in the place where fossils of its teeth are found.
Answer: