Answer: B. New fossils are continually being discovered.
Step-by-step explanation:
Fossils are the dead hard remains of plants, animals and other primitive organisms that existed on earth history.
The scientists are concerned about fossils because new fossils are continually discovered. After the excavation process the identification of the class, order, genus and species becomes the priority of the scientists. The scientists becomes curious to know the relatedness of the found fossils to the primitive known and present day organisms.