Final answer:
The geological formation at Mistaken Point is significant because it contains specimens from a more ancient time period than the Minatogawa quarry, housing fossils that document a critical moment in evolutionary history dealing with early multicellular life. Therefore, the correct option is c.
Step-by-step explanation:
The text indicates that the geological formation at Mistaken Point contains specimens from an older time period than those found in the formation at the Minatogawa quarry. The Mistaken Point reserve is a crucial site for understanding early multicellular life on Earth because it houses over 10,000 fossils documenting a critical moment in evolutionary history, known for the Ediacaran biota dating back around 600 to 700 million years ago. This precedes the Pleistocene era, during which the fossils in the Minatogawa quarry were deposited. Thus, for studying the emergence of the earliest multicellular organisms, researchers look to formations such as the one at Mistaken Point.