Question ID:PT61 S2 Q12 Passage:Shark teeth are among the most common vertebrate fossils; yet fossilized shark skeletons are much less common‚ indeed, comparatively rare among fossilized vertebrate skeletons. Stem:Which one of the following, if true, most helps to resolve the apparent paradox described above? Correct Answer Choice:AChoice A:Unlike the bony skeletons of other vertebrates, shark skeletons are composed of cartilage, and teeth and bone are much more likely to fossilize than cartilage is. Choice B:The rare fossilized skeletons of sharks that are found are often found in areas other than those in which fossils of shark teeth are plentiful. Choice C:Fossils of sharks' teeth are quite difficult to distinguish from fossils of other kinds of teeth. Choice D:Some species of sharks alive today grow and lose many sets of teeth during their lifetimes. Choice E:The physical and chemical processes involved in the fossilization of sharks' teeth are as common as those involved in the fossilization of shark skeletons.