Answer:
b. the locations of the fossils were once much closer to each other.
Step-by-step explanation:
This could happened depending the time that is calculate the fossils, could be in pangea times that could be a reasonable answer why they are in the same conditions but in different areas at this moment of the discover. Also the scientist can consider which other fossils are around like plants or other animals that can match like the spider mites. The different kinds of rocks and the layers above could be a clue to conclude about the location of these fossils.