While researching a topic, a student has taken the following notes:
·Sea angels and sea butterflies are ocean-dwelling snails that move by flapping two wing-like appendages.
·These organisms possess shells made of aragonite, a substance that dissolves more readily than the calcite that land-dwelling snails use to create their shells.
·A research team led by Katja Peijnenburg performed genetic analysis to better understand the evolutionary history of sea angels and sea butterflies.
·The research team determined that sea angels and sea butterflies "are much older than previously thought and must have survived previous episodes of widespread ocean acidification," according to a report by Peijnenburg.
·Two of the "previous episodes" cited by Peijnenburg took place 66 million years ago and 56 million years ago.
The student wants to summarize the aim and findings of Peijnenburg's research. Which choice most effectively uses relevant information from the notes to accomplish this goal?